{"title":"McDonnell \u0026 Miller","description":"\u003cp\u003eShop McDonnell \u0026amp; Miller low water cutoffs, flow switches, and boiler controls at New England Supply House. McDonnell \u0026amp; Miller — an ITT brand — has been the industry standard for boiler safety controls for over a century. Their low water cutoffs protect boilers from operating without sufficient water, preventing dangerous conditions and costly equipment damage.\u003c\/p\u003e\u003cp\u003eOur McDonnell \u0026amp; Miller inventory includes float-type and electronic low water cutoffs, combination low water cutoff and pump controllers, flow switches, and boiler accessories for steam and hot water systems. Boiler technicians and plumbing contractors throughout New England rely on McDonnell \u0026amp; Miller for dependable boiler safety. We stock a full range of residential and commercial part numbers with same-day shipping available.\u003c\/p\u003e","products":[{"product_id":"mcdonnell-miller-150s-hd-low-water-cut-off-pump-controller-head-mechanism","title":"McDonnell \u0026 Miller 150S-HD Low Water Cut-Off\/Pump Controller Head Mechanism","description":"\u003cdiv\u003e\n\u003cp\u003eThe 150S-HD Low Water Cut-Off\/Pump Controller Head Mechanism from McDonnell \u0026amp; Miller delivers dependable boiler safety by integrating a low-water cutoff with a pump controller. As a \u003cb\u003eType Head Mechanism\u003c\/b\u003e, it is designed for reliable operation in the 150S Series Low Water Cut-Off\/Pump Controller systems.\u003c\/p\u003e \u003cp\u003eUsed On 150S Series Low Water Cut-Off\/Pump Controller, this head mechanism serves as a reliable replacement part for McDonnell \u0026amp; Miller systems, helping maintain essential low-water safety functions, protecting boilers from damage, and ensuring consistent pump operation.\u003c\/p\u003e \u003cp\u003eDesigned to fit within the existing control head assemblies, the 150S-HD Head Mechanism supports accurate sensing and seamless integration with the 150S series’ control logic.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003eType\u003c\/b\u003e: Head Mechanism\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eCompatibility\u003c\/b\u003e: 150S Series Low Water Cut-Off\/Pump Controller\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eFunction\u003c\/b\u003e: Provides head mechanism integration for low-water cutoff and pump control\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eReplacement Part\u003c\/b\u003e: Direct replacement for McDonnell \u0026amp; Miller 150S systems\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eInstallation\u003c\/b\u003e: Designed to fit the 150S family control heads\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIn operation, this head mechanism helps maintain safe boiler conditions by ensuring timely activation of the low-water cutoff and the pump controller within the 150S series.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47601972183262,"sku":"3856","price":1132.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385295_b0ea2d96-f845-4627-8f2a-b1dd44572d60.jpg?v=1765816270"},{"product_id":"mcdonnell-miller-150s-m-hd-low-water-cut-off-pump-controller-head-mechanism","title":"McDonnell \u0026 Miller 150S-M-HD Low Water Cut-Off\/Pump Controller Head Mechanism","description":"\u003cdiv\u003e\n\u003cp\u003eMcDonnell \u0026amp; Miller 150S-M-HD Low Water Cut-Off\/Pump Controller Head Mechanism is a rugged head assembly designed to safeguard boiler operations. This Type Head Mechanism is used on the 150S Series Low Water Cut-Off\/Pump Controller and includes a manual reset for quick fault recovery and restart.\u003c\/p\u003e\n\u003cp\u003eDesigned for reliable boiler safety, the head mechanism monitors water level and drives the pump controller to prevent low-water conditions. It delivers dependable performance in industrial heating systems and integrates with standard 150S series controllers for a seamless retrofit. Built with robust materials to withstand vibration and harsh boiler-room environments, this head mechanism offers long service life and easy maintenance.\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eCompatibility: Used On 150S Series Low Water Cut-Off\/Pump Controller\u003c\/li\u003e \u003cli\u003eManual Reset: Includes manual reset for fast recovery\u003c\/li\u003e \u003cli\u003eType Head Mechanism: Classic head design for dependable operation\u003c\/li\u003e \u003cli\u003eDurable Construction: Designed to endure industrial boiler conditions\u003c\/li\u003e \u003cli\u003eEasy Integration: Works with existing 150S control panels and components\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47601972216030,"sku":"3858","price":1132.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385297_b6d018e9-a70e-4a87-9e25-8fcfa53fb450.jpg?v=1765816275"},{"product_id":"mcdonnell-miller-co-12-low-water-cut-off-pump-controller-head-gasket","title":"McDonnell \u0026 Miller CO-12 Low Water Cut-Off\/Pump Controller Head Gasket","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eLow Water Cut-Off\/Pump Controller Head Gasket\u003c\/b\u003e from McDonnell \u0026amp; Miller ensures reliable boiler safety and precise cut-off in 61\/63\/64 series systems. The CO-12 replacement gasket is engineered specifically as a head gasket for the low water cutoff\/pump controller, delivering a tight seal, temperature resistance, and consistent performance under boiler cycling.\u003c\/p\u003e \u003cp\u003eAs a Type Head Gasket, this part is manufactured to meet OEM specifications and designed for long life in demanding boiler environments. Used on the 61\/63\/64 Series Low Water Cut-Off\/Pump Controller, it ensures correct alignment and a reliable seal that helps prevent leaks, maintain accurate water level control, and protect overall system efficiency.\u003c\/p\u003e \u003cul\u003e \u003cli\u003eCompatibility: McDonnell \u0026amp; Miller CO-12 units for 61\/63\/64 series\u003c\/li\u003e \u003cli\u003ePremium gasket material resistant to heat, pressure, and steam\u003c\/li\u003e \u003cli\u003ePrecise factory-fit dimensions for easy installation\u003c\/li\u003e \u003cli\u003ePrevents water leaks that can trigger false cut-off or pump operation\u003c\/li\u003e \u003cli\u003eEnhances boiler safety and reliability by preserving head seal integrity\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eUpgrade your CO-12 head with this dedicated gasket to restore optimal performance and protect boiler uptime.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47601972248798,"sku":"4088","price":12.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385563_d083dc2d-75bd-4a11-aab7-66d648cdb126.jpg?v=1765816914"},{"product_id":"mcdonnell-miller-fs4-3-general-purpose-liquid-flow-switch","title":"McDonnell \u0026 Miller FS4-3 General Purpose Liquid Flow Switch","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eMcDonnell \u0026amp; Miller FS4-3 General Purpose Liquid Flow Switch\u003c\/b\u003e is a rugged paddle-type flow switch designed for reliable liquid flow monitoring in a wide range of systems. This 1 inch nominal size unit features a threaded end connection and a SPDT snap switch to deliver precise on\/off signals as flow is detected.\u003c\/p\u003e \u003cp\u003eBuilt for durability, the FS4-3 operates from 32 to 300°F and withstands up to 160 PSI. Electrical ratings include 7.4 A at 120 VAC and 3.7 A at 240 VAC, with a 125 VA input at 120\/240 VAC, 50\/60 Hz. The paddle-type flow switch employs a hardened stainless steel bearing and a sealed Monel bellows, delivering long life in challenging liquids while maintaining accurate switching.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003eSensitivity adjustable screw for precise setpoint\u003c\/li\u003e\n\u003cli\u003eIncludes two electrical knock-outs for easy wiring\u003c\/li\u003e\n\u003cli\u003eHardened stainless steel bearing for durability\u003c\/li\u003e\n\u003cli\u003eSealed Monel bellows for reliable operation in fluids\u003c\/li\u003e\n\u003cli\u003e1\" nominal size with threaded end connection\u003c\/li\u003e\n\u003cli\u003eSPDT snap switch provides simple control wiring\u003c\/li\u003e\n\u003cli\u003eUL (Canada and US) and CSA certified for safety\u003c\/li\u003e\n\u003cli\u003eFlow ranges: 6–10.2 GPM (flow) and 3.6–9.2 GPM (no flow)\u003c\/li\u003e\n\u003cli\u003eCurrent rating: 7.4 A at 120 VAC \/ 3.7 A at 240 VAC\u003c\/li\u003e\n\u003cli\u003eInput rating: 125 VA at 120\/240 VAC, 50\/60 Hz\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIdeal for general purpose flow sensing in boiler, HVAC, water treatment, and pump systems where dependable liquid monitoring is essential.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47601972281566,"sku":"4100","price":221.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385569_356857d1-9d62-443b-a912-361b4feaa80e.jpg?v=1765816948"},{"product_id":"mcdonnell-miller-fs8-w-general-purpose-liquid-flow-switch","title":"McDonnell \u0026 Miller FS8-W General Purpose Liquid Flow Switch","description":"\u003cdiv\u003e\n\u003cp\u003eGeneral Purpose Liquid Flow Switch: The McDonnell \u0026amp; Miller FS8-W is designed to monitor fluid flow with reliable performance. This paddle-type unit offers a 1 inch nominal size, threaded end connections, and a SPDT snap switch, ideal for flow alarms and control circuits.\u003c\/p\u003e \u003cp\u003eBuilt for demanding environments, the FS8-W features a sealed Monel bellows and an adjustable sensitivity screw to tailor response. It operates over a broad range from 32 to 300 F and up to 160 PSI, all inside a NEMA 4X enclosure that resists moisture and dust. Electrical ratings include 7.4 Amp at 120 VAC and 3.7 Amp at 240 VAC, with an input supply rating of 125 VA at 120\/240 VAC 50\/60 Hz. The unit responds to flow with a measured 4.9 to 17.6 GPM in flow and 3.4 to 15 GPM no-flow conditions. It is UL and CSA listed, ensuring safety and reliability in critical systems.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003ePaddle-type sensing element\u003c\/b\u003e for accurate flow detection\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003e1\" nominal size\u003c\/b\u003e with threaded end connections\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eSPDT snap switch\u003c\/b\u003e enables versatile control\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eNEMA 4X enclosure\u003c\/b\u003e for moisture and dust resistance\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eSealed Monel bellows\u003c\/b\u003e with an adjustable sensitivity screw\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47601972314334,"sku":"4148","price":288.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385589_d87cd1ca-62cd-431b-a8ef-7f98eee70a1f.jpg?v=1765817027"},{"product_id":"mcdonnell-miller-sa150-106r-low-water-cut-off-pump-controller-bellows-assembly","title":"McDonnell \u0026 Miller SA150-106R Low Water Cut-Off\/Pump Controller Bellows Assembly","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eMcDonnell \u0026amp; Miller SA150-106R Low Water Cut-Off\/Pump Controller Bellows Assembly\u003c\/b\u003e is a precision replacement part designed to protect boilers by accurately sensing water levels and coordinating pump operation. This bellows assembly ensures reliable low-water cut-off and smooth pump control for continued, safe boiler performance.\u003c\/p\u003e \u003cp\u003eUsed on 42\/42S\/150\/150S Series Low Water Cut-Off\/Pump Controller systems, this Type Bellows Assembly is built for durability and dependable operation in demanding boiler environments.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDirect replacement\u003c\/b\u003e for worn or damaged bellows in McDonnell \u0026amp; Miller low water cut-off\/pump controllers.\u003c\/li\u003e\n\u003cli\u003ePrecise water level sensing to trigger pump operation and prevent dry firing.\u003c\/li\u003e\n\u003cli\u003eCompatible with 42\/42S\/150\/150S Series Low Water Cut-Off\/Pump Controller units.\u003c\/li\u003e\n\u003cli\u003eDurable bellows design for long service life in boiler systems.\u003c\/li\u003e\n\u003cli\u003eEasy installation with standard fittings for quick maintenance.\u003c\/li\u003e\n\u003cli\u003eIdeal for commercial and light industrial boiler applications.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eInvest in this reliable bellows assembly to maintain safe boiler operation, minimize downtime, and protect your pump hardware. The SA150-106R fits the McDonnell \u0026amp; Miller family as a trusted replacement part for consistent performance.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47601972379870,"sku":"4200","price":344.74,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385601_9c9ddc30-53dd-42e2-b608-8c20295cd25f.jpg?v=1765817174"},{"product_id":"mcdonnell-miller-wfe-24v-boiler-water-feeder","title":"McDonnell \u0026 Miller WFE-24V Boiler Water Feeder","description":"\u003cdiv\u003e\n\u003cp\u003eThe McDonnell \u0026amp; Miller WFE-24V Boiler Water Feeder delivers reliable automatic feed for commercial and industrial boilers. Designed for commercial and industrial use, the McDonnell \u0026amp; Miller WFE-24V uses electronic actuation to maintain precise water levels with minimal supervision.\u003c\/p\u003e \u003cp\u003eThis boiler water feeder provides automatic boiler feed control for steady water levels in demanding settings. The 3\/8 inch port connections ensure secure piping, while the electronic actuation delivers responsive operation. With 24V AC input (15 VA), it supports reliable performance across standard boiler setups. Operating temperature: water up to 175°F, ambient up to 100°F; Pressure rating: 150 PSI (water), 15 PSI (boiler). Media handled: water.\u003c\/p\u003e \u003cp\u003e\u003cb\u003eInclusions\u003c\/b\u003e and components are designed for easy installation and long service life. The unit features a Manual Feed Button, Adapter, and Removable Strainer to simplify maintenance and setup in busy commercial environments.\u003c\/p\u003e \u003cul\u003e \u003cli\u003ePort connections: 3\/8\" Threaded x 3\/8\" Threaded\u003c\/li\u003e \u003cli\u003eActuation Type: Electronic\u003c\/li\u003e \u003cli\u003eInput Supply: 24V AC, 15 VA\u003c\/li\u003e \u003cli\u003eTemperature Rating: 175°F (Water), 100°F (Ambient)\u003c\/li\u003e \u003cli\u003ePressure Rating: 150 PSI (Water), 15 PSI (Boiler)\u003c\/li\u003e \u003cli\u003eMedia Handled: Water\u003c\/li\u003e \u003cli\u003eInclusions: Manual Feed Button, Adapter, Removable Strainer\u003c\/li\u003e \u003cli\u003eApplications: Commercial, Industrial\u003c\/li\u003e \u003cli\u003eStandards: UL (Canada and US)\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eChoose the WFE-24V for dependable \u003ci\u003eboiler feed\u003c\/i\u003e performance, seamless \u003ci\u003eelectronic actuation\u003c\/i\u003e, and compliance in both North American markets, ensuring efficient operation across diverse industrial applications.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47601972412638,"sku":"4266","price":384.96,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385825_f1e2a124-3cc5-40be-936e-65fd22245e9e.jpg?v=1765817376"},{"product_id":"mcdonnell-miller-rb-122-e-boiler-low-water-cut-off","title":"McDonnell \u0026 Miller RB-122-E Boiler Low Water Cut-Off","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eThe McDonnell \u0026amp; Miller RB-122-E Boiler Low Water Cut-Off\u003c\/b\u003e provides critical protection for boilers in residential and commercial settings. This probe-type, electronic low water cutoff uses a 3\/4 inch threaded port and automatic reset to ensure reliable shutoff when water levels fall below safe limits.\u003c\/p\u003e \u003cp\u003eDesigned for hot water systems, it handles up to 160 PSI (water) and 250°F water, with ambient temperatures to 120°F. It is powered by 120 V AC input and rated for 5.8 A of load switching, delivering dependable performance in demanding environments.\u003c\/p\u003e \u003cp\u003eUL listed for Canada and US protects your installation, with broad applications across residential and commercial systems.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003eProbe-type electronic low water cutoff\u003c\/b\u003e for precise water level sensing\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePort connection\u003c\/b\u003e: 3\/4 inch threaded\u003c\/li\u003e \u003cli\u003eAutomatic reset minimizes downtime\u003c\/li\u003e \u003cli\u003eCurrent rating: 5.8 A (load switching)\u003c\/li\u003e \u003cli\u003eInput supply: 120 V AC\u003c\/li\u003e \u003cli\u003eTemperature rating: 250°F (water) \/ 120°F (ambient)\u003c\/li\u003e \u003cli\u003ePressure rating: 160 PSI (water)\u003c\/li\u003e \u003cli\u003eMedia handled: Hot water\u003c\/li\u003e \u003cli\u003eApplications: Residential and Commercial\u003c\/li\u003e \u003cli\u003eProbe sensitivity: 20,000 ohms\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47601983160542,"sku":"35490","price":158.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385329_a544f9bd-5811-46ac-b60f-98dfb20e92ba.jpg?v=1765809101"},{"product_id":"mcdonnell-miller-fs254-general-purpose-liquid-flow-switch","title":"McDonnell \u0026 Miller FS254 General Purpose Liquid Flow Switch","description":"\u003cdiv\u003e\n\u003cp\u003eThe FS254 General Purpose Liquid Flow Switch from McDonnell \u0026amp; Miller delivers dependable flow monitoring for commercial heating, cooling, and process systems. This paddle-type universal flow switch uses a 1-inch nominal size with threaded end connections to integrate easily into standard piping.\u003c\/p\u003e\n\u003cp\u003eDesigned for rugged environments, the FS254 houses an SPDT snap switch inside a NEMA 4 enclosure, with an adjustable sensitivity screw and an EPDM O-ring for a secure seal. It’s built to withstand up to 160 psi and operates from 32 to 225°F, making it suitable for a variety of liquids and installations.\u003c\/p\u003e\n\u003cp\u003eElectrical and performance specs provide versatile control: 7.4 A at 120 VAC and 3.7 A at 240 VAC, with a 125 VA input rating at 120\/240 VAC (50\/60 Hz). The device detects flow across 5.8–17.6 GPM (flow) and 5.1–6.53 GPM (no flow). UL (Canada\/US) and CSA listings ensure utility in certified applications.\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003ePaddle-type universal design with adjustable sensitivity for precise control\u003c\/li\u003e \u003cli\u003e1\" nominal size with threaded x threaded end connections\u003c\/li\u003e \u003cli\u003eSPDT snap switch in a rugged NEMA 4 enclosure\u003c\/li\u003e \u003cli\u003eFlow range: 5.8–17.6 GPM; No-flow range: 5.1–6.53 GPM\u003c\/li\u003e \u003cli\u003eTemperature range 32–225°F and 160 psi pressure rating\u003c\/li\u003e \u003cli\u003eElectrical: 7.4 A @ 120 VAC; 3.7 A @ 240 VAC; 125 VA @ 120\/240 VAC\u003c\/li\u003e \u003cli\u003eIncludes EPDM O-ring; UL\/CSA listed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47601994531038,"sku":"112770","price":277.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385337_8eac3320-bafe-4180-976e-2dd69a064d81.jpg?v=1765808692"},{"product_id":"mcdonnell-miller-fs251-general-purpose-liquid-flow-switch","title":"McDonnell \u0026 Miller FS251 General Purpose Liquid Flow Switch","description":"\u003cdiv\u003e\n\u003cp\u003eMcDonnell \u0026amp; Miller FS251 General Purpose Liquid Flow Switch is a paddle-type flow switch designed for reliable liquid monitoring in industrial applications. This 1 inch nominal size unit features threaded end connections, a SPDT snap switch, and a rugged NEMA 1 enclosure, making it suitable for a wide range of liquids and installation environments.\u003c\/p\u003e \u003cp\u003eEngineered for precise response, the FS251 supports a wide flow band—from 5.8 to 17.6 GPM when flowing and 5.1 to 6.53 GPM in no-flow conditions—with a temperature rating of 32 to 225°F and a pressure rating up to 160 PSI. The adjustable sensitivity screw lets you tailor activation to your system, while the EPDM O-ring ensures a reliable seal. This UL- and CSA-listed device supports 120\/240 VAC service with current ratings of 7.4 A at 120 VAC and 3.7 A at 240 VAC, and up to 125 VA input supply.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003ePaddle-type sensing\u003c\/b\u003e for dependable liquid flow detection\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eNominal size 1 inch\u003c\/b\u003e with threaded end connections\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eSPDT snap switch\u003c\/b\u003e for simple circuit interfacing\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eNEMA 1 enclosure\u003c\/b\u003e protects electronics in indoor environments\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eWide flow ranges\u003c\/b\u003e 5.8–17.6 GPM (flow) \/ 5.1–6.53 GPM (no flow)\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eOperating range\u003c\/b\u003e 32–225°F and 160 PSI\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eReliability features\u003c\/b\u003e including EPDM O-ring and adjustable sensitivity\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eCertifications\u003c\/b\u003e UL and CSA listed for US\/Canada\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47601994694878,"sku":"113075","price":207.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385338_c6a15644-10dd-4c90-9bb2-a4b6dfbe4776.jpg?v=1765809329"},{"product_id":"mcdonnell-miller-rb-24e-l-boiler-low-water-cut-off","title":"McDonnell \u0026 Miller RB-24E-L Boiler Low Water Cut-Off","description":"\u003cdiv\u003e\n\u003cp\u003eRB-24E-L Boiler Low Water Cut-Off by McDonnell \u0026amp; Miller delivers reliable protection for residential boilers. This \u003cb\u003eprobe-type low water cutoff\u003c\/b\u003e uses \u003cb\u003esolid-state\/electronic actuation\u003c\/b\u003e to detect low-water conditions and provide automatic reset, helping prevent dry-fires and equipment damage.\u003c\/p\u003e\n\u003cp\u003eDesigned for easy installation with a \u003cb\u003e3\/4 inch threaded port\u003c\/b\u003e, the RB-24E-L supports \u003cb\u003e24 VAC input\u003c\/b\u003e and delivers a stable \u003cb\u003e2 A current rating\u003c\/b\u003e for dependable operation. Its operating range includes water temperatures up to \u003cb\u003e250°F\u003c\/b\u003e and ambient temperatures to \u003cb\u003e120°F\u003c\/b\u003e, with a water pressure rating of \u003cb\u003e160 PSI\u003c\/b\u003e. This UL-listed unit is intended for \u003cb\u003eresidential boiler protection\u003c\/b\u003e and includes a \u003cb\u003eburner control harness\u003c\/b\u003e for quick hookup.\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cb\u003eType\u003c\/b\u003e: Probe-style low water cutoff with solid-state\/electronic actuation\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePort\u003c\/b\u003e: 3\/4 inch threaded connection\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eElectrical\u003c\/b\u003e: 24 VAC input, 2 A current rating, ~2.5 VA\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePerformance\u003c\/b\u003e: Temperature rating 120°F ambient \/ 250°F water; 160 PSI water pressure\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eSafety\u003c\/b\u003e: UL-listed for US and Canada; automatic reset\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eInclusions\u003c\/b\u003e: Burner control harness\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eSensitivity\u003c\/b\u003e: Probe sensitivity 15,000 Ω\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47601997545694,"sku":"123495","price":166.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385339_73a96caa-a115-4e3e-9005-fe543e0a58e9.jpg?v=1765816031"},{"product_id":"mcdonnell-miller-tc-4-boiler-control-check-valve","title":"McDonnell \u0026 Miller TC-4 Boiler Control Check Valve","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eBoiler Control Check Valve\u003c\/b\u003e from McDonnell \u0026amp; Miller, TC-4, delivers reliable boiler control in commercial and industrial systems. The 1 inch nominal size with threaded end connections makes it easy to retrofit into existing piping.\u003c\/p\u003e\n\u003cp\u003eDesigned for boiler control applications, this valve is rated for up to 250°F and 160 psi, ensuring dependable operation under typical boiler conditions. It is UL listed for Canada and US compliance, providing peace of mind for both local and cross-border installations.\u003c\/p\u003e\n\u003cp\u003eInclusions include one upper and one lower valve for mounting at crosses in the equalizing line, simplifying alignment and maintenance.\u003c\/p\u003e\n\u003cp\u003eFeatures at a glance:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e1 in nominal size with threaded end connections\u003c\/li\u003e \u003cli\u003eEnd-to-end distance: 5 in\u003c\/li\u003e \u003cli\u003eTemperature rating: 250°F\u003c\/li\u003e \u003cli\u003ePressure rating: 160 psi\u003c\/li\u003e \u003cli\u003eIncludes upper and lower valve for mounting at crosses in the equalizing line\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605408334046,"sku":"4265","price":811.57,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385823_1a2e8d78-d713-4257-af5e-88b616694f24.jpg?v=1765817370"},{"product_id":"mcdonnell-miller-421-30-boiler-control-float","title":"McDonnell \u0026 Miller 421-30 Boiler Control Float","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eMcDonnell \u0026amp; Miller 421-30 Boiler Control Float\u003c\/b\u003e provides reliable, float-based control for compatible boiler systems. This Type Float control is designed for use on the 25-A Series Water Feeder and the 27-W Series Liquid Level Control, and it includes a gasket for a secure, leak-free seal. Engineered for easy replacement within McDonnell \u0026amp; Miller boiler assemblies, this float control helps maintain accurate water levels, reduces operator adjustments, and contributes to safer, more efficient boiler operation across light commercial and residential settings.\u003c\/p\u003e \u003cul\u003e \u003cli\u003eCompatible with 25-A Series Water Feeder\u003c\/li\u003e \u003cli\u003eCompatible with 27-W Series Liquid Level Control\u003c\/li\u003e \u003cli\u003eType Float design for reliable level sensing\u003c\/li\u003e \u003cli\u003eIncludes gasket for quick, leak-proof installation\u003c\/li\u003e \u003cli\u003eMcDonnell \u0026amp; Miller parts compatibility for easy maintenance\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eKeep this component in your service kit to ensure consistent performance and dependable boiler operation over time.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605408432350,"sku":"3982","price":374.9,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385403_84de421a-7538-4d1d-91a0-93d500cdd5e7.jpg?v=1765816617"},{"product_id":"mcdonnell-miller-150s-boiler-low-water-cut-off-pump-controller","title":"McDonnell \u0026 Miller 150S Boiler Low Water Cut-Off\/Pump Controller","description":"\u003cdiv\u003e\n\u003cp\u003eThe McDonnell \u0026amp; Miller 150S Boiler Low Water Cut-Off\/Pump Controller is a critical safety and control device for commercial and industrial boilers. This mechanical actuation unit combines a low-water cutoff with a pump controller to prevent boiler damage and ensure reliable operation in steam and hot-water systems.\u003c\/p\u003e \u003cp\u003eDesigned for durability and easy integration, this unit features a 1 inch BSPT port, 120\/240 Volt AC input, and robust current ratings that cover full-load and alarm service. The 150S supports steam and water media, with a pressure rating up to 150 PSI, making it suitable for demanding boiler applications.\u003c\/p\u003e \u003cul\u003e \u003cli\u003eMechanical actuation for dependable response\u003c\/li\u003e \u003cli\u003e1 inch BSPT port connections for versatile installation\u003c\/li\u003e \u003cli\u003eInput supply: 120\/240 VAC; full-load current 7.4 A (120V) \/ 3.7 A (240V)\u003c\/li\u003e \u003cli\u003eAlarm circuit: 1 A (120V) \/ 0.5 A (240V); locked-rotor ratings 44.4 A (120V) \/ 22.2 A (240V)\u003c\/li\u003e \u003cli\u003eMedia: Steam and water; Pressure rating: 150 PSI\u003c\/li\u003e \u003cli\u003eApplication: Commercial and industrial boiler systems\u003c\/li\u003e \u003cli\u003eStandards: UL, CSA, FM-listed\u003c\/li\u003e \u003cli\u003eDimensions: 13-1\/4\" L x 12-7\/16\" H\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eTrustworthy boiler safety and efficiency with the McDonnell \u0026amp; Miller 150S, a proven choice for protecting equipment and ensuring continuous operation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605408465118,"sku":"3855","price":1220.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385294_36f22bb9-44d6-47bd-bd49-690b0524d197.jpg?v=1765816268"},{"product_id":"mcdonnell-miller-150s-m-boiler-low-water-cut-off-pump-controller","title":"McDonnell \u0026 Miller 150S-M Boiler Low Water Cut-Off\/Pump Controller","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eThe McDonnell \u0026amp; Miller 150S-M Boiler Low Water Cut-Off\/Pump Controller\u003c\/b\u003e provides reliable boiler protection for commercial and industrial systems. This mechanical actuation device combines a low water cut-off with a pump controller to prevent overheating and dry firing, helping to extend equipment life and improve safety. The unit features a 1 inch BSPT port, robust construction for steam and water media, and a 150 PSI pressure rating, making it suitable for demanding boiler applications.\u003c\/p\u003e \u003cp\u003eDesigned for compatibility with standard electrical controls, this controller operates on 120\/240 VAC and is UL, CSA, FM listed for added confidence. It includes a manual reset and offers practical installation and operation in busy plant environments.\u003c\/p\u003e \u003cul\u003e \u003cli\u003ePort connection: 1 inch BSPT for easy integration.\u003c\/li\u003e \u003cli\u003eMechanical actuation with manual reset for reliable safety control.\u003c\/li\u003e \u003cli\u003eElectrical ratings: 7.4 A @ 120 V \/ 3.7 A @ 240 V (full load); 44.4 A @ 120 V \/ 22.2 A @ 240 V (locked rotor); Alarm circuit: 1 A @ 120 V \/ 0.5 A @ 240 V.\u003c\/li\u003e \u003cli\u003eInput supply: 120\/240 VAC; 345 VA input capacity.\u003c\/li\u003e \u003cli\u003eMedia handled: Steam and water, built for boiler environments.\u003c\/li\u003e \u003cli\u003ePressure rating: 150 PSI.\u003c\/li\u003e \u003cli\u003eDimensions: 13-1\/4 in. L x 12-7\/16 in. H.\u003c\/li\u003e \u003cli\u003eApplications \u0026amp; standards: Commercial and industrial use; UL, CSA, FM listed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605408530654,"sku":"3857","price":1220.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385296_edcc0aba-c904-44c8-b3d0-75db0d7c6c91.jpg?v=1765816273"},{"product_id":"mcdonnell-miller-150s-md-boiler-low-water-cut-off-pump-controller","title":"McDonnell \u0026 Miller 150S-MD Boiler Low Water Cut-Off\/Pump Controller","description":"\u003cdiv\u003e\n\u003cp\u003eThe McDonnell \u0026amp; Miller 150S-MD Boiler Low Water Cut-Off\/Pump Controller is a critical safety and control device for commercial and industrial boilers. This mechanical actuation-based unit combines a low water cutoff with a pump controller to protect boiler operation and prevent equipment damage.\u003c\/p\u003e \u003cp\u003eDesigned for steam and water systems, it features a 1 inch BSPT port connection, a 50 PSI pressure rating, and flexible power options for 120\/240 VAC. The unit handles 7.4 A at 120V or 3.7 A at 240V under full load, with higher locked-rotor currents, and includes an alarm circuit rated at 1 A (120V) or 1\/2 A (240V). Suitable for commercial and industrial boiler applications, it is UL, CSA, and FM listed to meet rigorous standards.\u003c\/p\u003e \u003cul\u003e \u003cli\u003ePort connection: 1 inch BSPT\u003c\/li\u003e \u003cli\u003eActuation: Mechanical\u003c\/li\u003e \u003cli\u003eElectrical ratings: 120V\/240V input; 7.4 A at 120V, 3.7 A at 240V (full load); 44.4 A at 120V, 22.2 A (locked rotor)\u003c\/li\u003e \u003cli\u003eAlarm circuit: 1 A at 120V, 1\/2 A at 240V\u003c\/li\u003e \u003cli\u003eMedia handled: Steam and Water\u003c\/li\u003e \u003cli\u003ePressure rating: 50 PSI\u003c\/li\u003e \u003cli\u003eDimensions: 13-1\/4 in L x 12-7\/16 in H\u003c\/li\u003e \u003cli\u003eApplications: Commercial and Industrial boiler systems\u003c\/li\u003e \u003cli\u003eCertifications: UL, CSA, FM listed\u003c\/li\u003e \u003cli\u003eInput supply rating: 120\/240 VAC, 345 VA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605408792798,"sku":"6048","price":1220.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385785_304f98ac-8fce-42a7-878b-214df6252fa8.jpg?v=1765821170"},{"product_id":"mcdonnell-miller-193-boiler-low-water-cut-off-pump-controller","title":"McDonnell \u0026 Miller 193 Boiler Low Water Cut-Off\/Pump Controller","description":"\u003cdiv\u003e\n\u003cp\u003eThe McDonnell \u0026amp; Miller 193 Boiler Low Water Cut-Off\/Pump Controller is engineered to protect boilers by precisely monitoring water level and automating feed pump control. This mechanical actuation device features 1-inch x 1-inch threaded port connections, and is suitable for steam or water media. With a rugged design for commercial and industrial settings, it supports operation from 120\/240 V AC and up to 345 VA. The unit includes a Series 5 switch and is UL, CSA, FM listed, meeting essential safety and performance standards. Dimensions are 13 inches long by 20.5 inches tall, making it compatible with standard boiler skids and pipe layouts for dependable low-water cut-off and pump control in a single integrated unit.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003eIntegrated protection:\u003c\/b\u003e low-water cut-off and pump controller in a single unit for streamlined boiler protection.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMechanical actuation:\u003c\/b\u003e reliable, electronics-free operation ideal for harsh industrial environments.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eSeries 5 Switch:\u003c\/b\u003e precision switching for consistent boiler control.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eVersatile connections:\u003c\/b\u003e 1-inch x 1-inch threaded port connections simplify installation.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eCertified and robust:\u003c\/b\u003e UL, CSA, FM listed for commercial and industrial safety; supports steam and water media; 120\/240 V AC; up to 345 VA.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605408956638,"sku":"3897","price":2316.91,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385300_6473fbf1-99f4-4855-b256-bfebb1a3449e.jpg?v=1765816404"},{"product_id":"mcdonnell-miller-193-7b-boiler-low-water-cut-off-pump-controller","title":"McDonnell \u0026 Miller 193-7B Boiler Low Water Cut-Off\/Pump Controller","description":"\u003cdiv\u003e\n\u003cp\u003eThe McDonnell \u0026amp; Miller 193-7B Boiler Low Water Cut-Off\/Pump Controller delivers reliable protection for your boiler system, combining a low-water cut-off with a versatile pump controller in a rugged mechanical actuation design.\u003c\/p\u003e\n\u003cp\u003eDesigned for commercial and industrial boiler setups, this unit supports 1 inch threaded port connections and comes with a Series 7B switch, meeting UL, CSA, and FM standards for safety and performance. Ideal for retrofits and new installations, it integrates seamlessly with existing boiler control schemes.\u003c\/p\u003e\n\u003cp\u003eWith a compact footprint of 13 inches in length and 20-1\/2 inches in height, it handles steam and water media at up to 150 PSI. The input supply is 120\/240 VAC (345 VA), making it compatible with common plant electrical systems and fits standard 120\/240V power distribution.\u003c\/p\u003e\n\u003cp\u003eBuilt to endure demanding industrial environments, it delivers reliable operation under varying steam and water conditions, with a robust 150 PSI rating and UL\/CSA\/FM certification.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e1\" threaded port connections (inlet\/outlet)\u003c\/li\u003e \u003cli\u003eMechanical actuation\u003c\/li\u003e \u003cli\u003e13\" L x 20-1\/2\" H dimensions\u003c\/li\u003e \u003cli\u003e120\/240 VAC, 345 VA input\u003c\/li\u003e \u003cli\u003e150 PSI pressure rating\u003c\/li\u003e \u003cli\u003eMedia: steam and water\u003c\/li\u003e \u003cli\u003eIncludes Series 7B switch\u003c\/li\u003e \u003cli\u003eUL, CSA, FM listed\u003c\/li\u003e \u003cli\u003eCommercial and industrial application\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605408989406,"sku":"3898","price":3153.61,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385301_d3ee5553-2ee1-4164-b7f1-64df637cd5d1.jpg?v=1765816406"},{"product_id":"mcdonnell-miller-42s-boiler-low-water-cut-off-pump-controller","title":"McDonnell \u0026 Miller 42S Boiler Low Water Cut-Off\/Pump Controller","description":"\u003cdiv\u003e\n\u003cp\u003eThe McDonnell \u0026amp; Miller 42S Boiler Low Water Cut-Off\/Pump Controller is a trusted boiler low water cutoff and pump controller designed to protect boilers from dry firing and brittle operation.\u003c\/p\u003e\n\u003cp\u003eThis versatile unit combines protective low-water control with pump management for steam and water media across residential, commercial, and industrial applications. It features a 1 inch threaded port for easy integration, a SPST snap action switch for precise signaling, and broad electrical compatibility, including 120\/240 VAC inputs up to 345 VA. The 42S supports a wide range of operating currents and includes a dedicated alarm circuit for safety. Built to meet safety standards (UL, CSA, FM), it delivers reliable performance in demanding environments with a 50 PSI pressure rating.\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cb\u003ePort Connection:\u003c\/b\u003e 1 inch threaded\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eSwitch Type:\u003c\/b\u003e SPST Snap Action\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eDimensions:\u003c\/b\u003e 12-1\/4 in W x 8-7\/8 in H\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eCurrent Rating (Full Load):\u003c\/b\u003e 7.4 A @ 120 V; 3.7 A @ 240 V\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eLocked Rotor Current:\u003c\/b\u003e 44.4 A @ 120 V; 22.2 A @ 240 V\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eAlarm Circuit:\u003c\/b\u003e 1 A @ 120 V; 1\/2 A @ 240 V\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eInput Supply Rating:\u003c\/b\u003e 120\/240 VAC, 345 VA\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMedia Handled:\u003c\/b\u003e Steam, Water\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eApplications:\u003c\/b\u003e Residential, Commercial, Industrial\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eStandards:\u003c\/b\u003e UL, CSA, FM\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePressure Rating:\u003c\/b\u003e 50 PSI\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605409087710,"sku":"51479","price":1085.92,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385334_5433a7f0-6902-488d-989a-e65258504276.jpg?v=1765810572"},{"product_id":"mcdonnell-miller-94-boiler-low-water-cut-off-pump-controller","title":"McDonnell \u0026 Miller 94 Boiler Low Water Cut-Off\/Pump Controller","description":"\u003cdiv\u003e\n\u003cp\u003eThe McDonnell \u0026amp; Miller 94 Boiler Low Water Cut-Off\/Pump Controller is a rugged boiler safety device designed for commercial and industrial systems. This dual-function unit combines a low-water cut-off with a pump controller to protect equipment and optimize boiler operation. Featuring mechanical actuation and 1-1\/4 inch threaded port connections, it installs easily into standard piping configurations.\u003c\/p\u003e \u003cp\u003eEngineered for reliability in demanding environments, the unit delivers robust specs: 12-15\/16 inch length, 18-13\/16 inch height, a 250 PSI pressure rating, and compatibility with steam and water media. It supports 120\/240 V AC input up to 345 VA to fit diverse facility electrical needs. The assembly includes a Series 5 switch and a 10-bolt flange for solid mounting, and it meets UL, CSA, and FM safety standards for commercial and industrial boiler service.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003ePrimary function:\u003c\/b\u003e Low-water cutoff with integrated pump controller\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePort connections:\u003c\/b\u003e 1-1\/4\" threaded x 1-1\/4\" threaded\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eElectrical rating:\u003c\/b\u003e 120\/240 V AC, up to 345 VA\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMedia handled:\u003c\/b\u003e Steam and water\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eConstruction:\u003c\/b\u003e Mechanical actuation, Series 5 switch, 10-bolt flange\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eCompliance:\u003c\/b\u003e UL, CSA, FM approved\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605409120478,"sku":"4071","price":2351.39,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385553_55eeb5b7-15cc-4586-beed-507538d6a02e.jpg?v=1765816852"},{"product_id":"mcdonnell-miller-194-boiler-low-water-cut-off-pump-controller","title":"McDonnell \u0026 Miller 194 Boiler Low Water Cut-Off\/Pump Controller","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eMcDonnell \u0026amp; Miller 194 Boiler Low Water Cut-Off\/Pump Controller\u003c\/b\u003e is a rugged mechanical actuation device designed to protect boilers in demanding commercial and industrial environments. This combined low water cut-off and pump controller provides reliable safety by monitoring water levels and coordinating the feed pump as conditions require.\u003c\/p\u003e \u003cp\u003eKey specifications include port connections of 1-1\/4 inch threaded x 1-1\/4 inch threaded, overall dimensions of 13-1\/16 inch length by 20-1\/2 inch height, and an input supply rating of 120\/240 VAC (345 VA). The unit carries a 250 PSI pressure rating and handles media such as steam and water. It features a Series 5 Switch and a 10-bolt flange, with mechanical actuation for dependable, maintenance-friendly operation.\u003c\/p\u003e \u003cp\u003eDesigned for commercial and industrial boiler installations, this controller is built to meet UL, CSA, and FM standards, delivering robust performance in demanding environments.\u003c\/p\u003e \u003cul\u003e \u003cli\u003ePort connections: 1-1\/4\" threaded x 1-1\/4\" threaded\u003c\/li\u003e \u003cli\u003eActuation: Mechanical\u003c\/li\u003e \u003cli\u003eSeries 5 Switch with 10-bolt flange\u003c\/li\u003e \u003cli\u003eMedia: Steam and Water\u003c\/li\u003e \u003cli\u003eDimensions: 13-1\/16\" L × 20-1\/2\" H\u003c\/li\u003e \u003cli\u003eElectrical: 120\/240 VAC input, 345 VA\u003c\/li\u003e \u003cli\u003ePressure rating: 250 PSI\u003c\/li\u003e \u003cli\u003eApplications: Commercial and Industrial boiler systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605409153246,"sku":"3904","price":2703.3,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385302_47c9fc9f-948e-498c-9ebc-2a37311fb679.jpg?v=1765816422"},{"product_id":"mcdonnell-miller-194-7b-boiler-low-water-cut-off-pump-controller","title":"McDonnell \u0026 Miller 194-7B Boiler Low Water Cut-Off\/Pump Controller","description":"\u003cdiv\u003e\n\u003cp\u003eThe McDonnell \u0026amp; Miller 194-7B Boiler Low Water Cut-Off\/Pump Controller is a critical safety and control device for commercial and industrial boilers. This mechanical actuation system combines a reliable low-water cut-off with a pump controller to safeguard your boiler operation and prevent damage.\u003c\/p\u003e \u003cp\u003eWith 1-1\/4 inch threaded port connections, a 250 PSI pressure rating, and the ability to handle steam and water media, the 194-7B performs in demanding environments. It features a 120\/240 VAC input supply and up to 345 VA, making it compatible with many existing boiler controls. The unit includes a Series 7B Switch and a 10-bolt flange for secure installation, and it adheres to UL, CSA, and FM standards for added reliability.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003eMechanical actuation\u003c\/b\u003e ensures precise, hands-free operation\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003e1-1\/4\" threaded port connections\u003c\/b\u003e for straightforward plumbing\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eSeries 7B Switch\u003c\/b\u003e and \u003cb\u003e10-Bolt Flange\u003c\/b\u003e included\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eUL, CSA, FM approved\u003c\/b\u003e for trusted safety compliance\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eIndustrial, commercial boiler applications\u003c\/b\u003e with steam and water media\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eChoose the McDonnell \u0026amp; Miller 194-7B for dependable low-water protection and coordinated pump control, minimizing downtime and extending boiler life.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605409218782,"sku":"3905","price":3607.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385303_61d4570b-1f36-4d47-b1fa-8b3f2d63f318.jpg?v=1765816427"},{"product_id":"mcdonnell-miller-61-boiler-low-water-cut-off","title":"McDonnell \u0026 Miller 61 Boiler Low Water Cut-Off","description":"\u003cdiv\u003e\n\u003cp\u003eThe McDonnell \u0026amp; Miller 61 Boiler Low Water Cut-Off is a critical safety device that prevents boiler damage by automatically stopping operation when water is too low. This Boiler Low Water Cut-Off provides reliable protection for steam systems in both residential and commercial setups. With mechanical actuation, it delivers dependable performance without the need for batteries or electronics.\u003c\/p\u003e \u003cp\u003eKey specifications include 1 inch threaded port connections, compact sizing (9-15\/16\" long x 5-1\/8\" wide x 6-1\/2\" high), and a versatile input supply rating of 120\/240 VAC. It supports steam and water media and is rated for 20 PSI steam pressure. This unit is UL, CSA, and FM approved, meeting strict safety standards for peace of mind.\u003c\/p\u003e \u003cul\u003e \u003cli\u003eMechanical actuation ensures consistent cut-off response\u003c\/li\u003e \u003cli\u003e1\" threaded port connections for easy installation\u003c\/li\u003e \u003cli\u003eSuitable for steam and water media in residential or commercial boilers\u003c\/li\u003e \u003cli\u003eUL, CSA, FM safety approvals for compliance\u003c\/li\u003e \u003cli\u003eCompact dimensions and versatile 120\/240 VAC power ratings\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eUpgrade your boiler protection with this robust low water cut-off from McDonnell \u0026amp; Miller, designed to safeguard against low-water conditions and ensure reliable operation of your heating system.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605409677534,"sku":"4020","price":670.8,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385419_e54320a2-0d65-4df2-91a0-4f73bc64092d.jpg?v=1765816726"},{"product_id":"mcdonnell-miller-69-boiler-low-water-cut-off","title":"McDonnell \u0026 Miller 69 Boiler Low Water Cut-Off","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eMcDonnell \u0026amp; Miller 69 Boiler Low Water Cut-Off\u003c\/b\u003e protects steam boilers by automatically shutting down when water levels drop, preventing damage and costly shutdowns. This built-in, mechanical low-water cutoff delivers dependable protection for both residential and industrial boiler systems. The unit features a 2-1\/2 inch threaded port, a compact 9-1\/2 inch by 4-1\/8 inch footprint, and an insertion length of 4-1\/8 inch, making it easy to retrofit into compatible boiler assemblies. Rated for 120\/240 VAC, it accommodates various control circuits while meeting UL, CSA, and FM safety standards.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003eType:\u003c\/b\u003e Built-In Low Water Cut-Off\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePort Connection:\u003c\/b\u003e 2-1\/2\" Threaded\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eActuation:\u003c\/b\u003e Mechanical\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eInsertion Length:\u003c\/b\u003e 4-1\/8\"\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eDimensions:\u003c\/b\u003e 9-1\/2\" L × 4-1\/8\" W\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eCurrent Rating:\u003c\/b\u003e 7.4 A @ 120V AC \/ 3.7 A @ 240V AC (full load); 44.4 A @ 120V AC \/ 22.2 A @ 240V AC (locked rotor)\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMedia Handled:\u003c\/b\u003e Steam, Water\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePressure Rating:\u003c\/b\u003e 20 psi (Steam)\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eApplications:\u003c\/b\u003e Residential, Industrial\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eStandards:\u003c\/b\u003e UL, CSA, FM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605409710302,"sku":"4040","price":474.01,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385432_5244f897-483f-44be-8e99-bdf85c7c7fa1.jpg?v=1765816790"},{"product_id":"mcdonnell-miller-369-boiler-low-water-cut-off","title":"McDonnell \u0026 Miller 369 Boiler Low Water Cut-Off","description":"\u003cdiv\u003e\n\u003cp\u003eBoiler Low Water Cut-Off, the McDonnell \u0026amp; Miller 369, delivers reliable boiler protection with a built-in low water cutoff. Designed for both residential and industrial boilers, this mechanical-actuation device ensures safe operation in steam and water systems.\u003c\/p\u003e\n\u003cp\u003eFeaturing a 2-1\/2 inch threaded port and a compact footprint (9-1\/2 inches long by 4-1\/8 inches wide), it installs easily into existing boiler setups. The unit supports 120\/240 volt AC power, with full-load currents of 7.4 A at 120 V and 3.7 A at 240 V, and locked-rotor ratings of 44.4 A at 120 V \/ 22.2 A at 240 V, making it compatible with a wide range of residential and commercial circuits.\u003c\/p\u003e\n\u003cp\u003eKey specifications include a 20 PSI steam pressure rating, and the device handles both steam and water media. Insertion length is 1-3\/4 inch, and it carries UL, CSA, and FM listings for added safety and reliability.\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eBuilt-In low water cutoff for automatic boiler protection\u003c\/li\u003e \u003cli\u003eMechanical actuation for reliable operation\u003c\/li\u003e \u003cli\u003e2-1\/2 inch threaded port and 9-1\/2\" x 4-1\/8\" footprint\u003c\/li\u003e \u003cli\u003e120\/240 V AC input with listed current ratings\u003c\/li\u003e \u003cli\u003eSuitable for steam and water media, 20 PSI steam rating\u003c\/li\u003e \u003cli\u003eIdeal for residential and industrial applications\u003c\/li\u003e \u003cli\u003eUL, CSA, FM listed\u003c\/li\u003e \u003cli\u003eInsertion length: 1-3\/4 inch\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605409841374,"sku":"3973","price":525.72,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385323_f07440b0-1999-44a6-9e40-e6d65d10b9a6.jpg?v=1765816579"},{"product_id":"mcdonnell-miller-469-boiler-low-water-cut-off","title":"McDonnell \u0026 Miller 469 Boiler Low Water Cut-Off","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eMcDonnell \u0026amp; Miller 469 Boiler Low Water Cut-Off\u003c\/b\u003e ensures reliable boiler protection for steam and hot water systems. This float-type, mechanical-actuation low-water cutoff helps prevent dangerous low-water conditions by automatically shutting the boiler off when water levels fall below the safe threshold. Built for both residential and commercial use, it combines rugged construction with precise sensing to reduce downtime and maintenance.\u003c\/p\u003e \u003cp\u003eKey specifications support durable performance in demanding environments, including a 2-1\/2 inch female threaded port, a 9-1\/2 inch overall length, and a packless bellows design for long life. It operates with 120\/240 VAC input, providing a full-load current of 7.4 A at 120 V and 3.7 A at 240 V, and is rated for 20 PSI steam. This unit handles steam and water media and meets safety standards for reliable operation.\u003c\/p\u003e \u003cul\u003e \u003cli\u003eFloat-type, mechanical actuation for fast, reliable shut-off\u003c\/li\u003e \u003cli\u003ePackless bellows design for increased durability and longevity\u003c\/li\u003e \u003cli\u003ePort connection: 2-1\/2 inch female threaded; insertion length: 1-3\/16 inch\u003c\/li\u003e \u003cli\u003eOverall length: 9-1\/2 inch; media handled: steam and water\u003c\/li\u003e \u003cli\u003eCurrent rating: 7.4 A at 120 V; 3.7 A at 240 V (full load)\u003c\/li\u003e \u003cli\u003eInput supply: 120\/240 V AC; 125 V Amp; pressure rating: 20 PSI (steam)\u003c\/li\u003e \u003cli\u003eApplications: residential and commercial boiler protection; UL, CSA, FM approved\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605410103518,"sku":"3985","price":469.04,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385404_d2623bf0-6ce6-41ca-951e-f835550c1a2d.jpg?v=1765816629"},{"product_id":"mcdonnell-miller-67-boiler-low-water-cut-off","title":"McDonnell \u0026 Miller 67 Boiler Low Water Cut-Off","description":"\u003cdiv\u003e\n\u003cp\u003eThe McDonnell \u0026amp; Miller 67 Boiler Low Water Cut-Off is a float-type safety device designed to protect steam boilers by monitoring water level and automatically shutting off the boiler if levels fall too low. This lever\/mechanical actuation model delivers reliable, maintenance-friendly protection for both residential and commercial systems, helping prevent costly damage and downtime.\u003c\/p\u003e \u003cp\u003eDesigned for flexible installation, it uses multiple port connections (1\/4\" x 3\/8\" x 3\/4\" threaded) to fit a wide range of boiler piping configurations and is suitable for both new installs and retrofits. It handles steam and water media, and supports standard electrical ratings to match most residential and commercial systems, ensuring dependable performance under varying load conditions.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003eType:\u003c\/b\u003e Float\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eActuation:\u003c\/b\u003e Lever\/Mechanical\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePorts:\u003c\/b\u003e 1\/4\" x 3\/8\" x 3\/4\" threaded\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eDimensions:\u003c\/b\u003e 9-23\/32\" length\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eElectrical ratings:\u003c\/b\u003e 7.4 A @ 120V, 3.7 A @ 240V (full load); 44.4 A @ 120V, 22.2 A @ 240V (locked rotor)\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eInput supply:\u003c\/b\u003e 120\/240V AC, 125V Amp\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMedia handled:\u003c\/b\u003e Steam, Water\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePressure rating:\u003c\/b\u003e 20 psi (Steam)\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eApplications:\u003c\/b\u003e Residential, Commercial\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eStandards:\u003c\/b\u003e UL, CSA, FM\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eDesigned for reliable, code-compliant performance, the McDonnell \u0026amp; Miller 67 Boiler Low Water Cut-Off provides essential protection for boiler systems, backed by UL, CSA, and FM standards.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605410136286,"sku":"4036","price":602.57,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385429_526a73bb-1ee5-4944-9ad8-b5cd5e07cea9.jpg?v=1765816769"},{"product_id":"mcdonnell-miller-67g-boiler-low-water-cut-off","title":"McDonnell \u0026 Miller 67G Boiler Low Water Cut-Off","description":"\u003cdiv\u003e\n\u003cp\u003eThe \u003cb\u003eMcDonnell \u0026amp; Miller 67G Boiler Low Water Cut-Off\u003c\/b\u003e is a critical safety device for steam boilers. This float-type low water cutoff protects residential and commercial boiler systems by preventing dangerous low-water conditions that can damage equipment or trigger unexpected shutdowns.\u003c\/p\u003e \u003cp\u003eDesigned with lever\/mechanical actuation, it offers versatile port connections and reliable operation across standard piping. The unit handles steam and water media and is suitable for millivolt service applications, making it a robust choice for both home and business boiler setups.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cb\u003ePort connections:\u003c\/b\u003e 1\/4 inch, 3\/8 inch, and 3\/4 inch threaded ports\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eCurrent rating:\u003c\/b\u003e 7.4 A at 120 V AC \/ 3.7 A at 240 V AC (full load); 44.4 A at 120 V AC \/ 22.2 A at 240 V AC (locked rotor)\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eInput supply rating:\u003c\/b\u003e 120\/240 V AC, 125 VA\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePressure rating:\u003c\/b\u003e 20 PSI (Steam)\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMedia:\u003c\/b\u003e Steam and Water\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eApplication:\u003c\/b\u003e Millivolt service, Residential, Commercial\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eStandards:\u003c\/b\u003e UL, CSA, FM listed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605410201822,"sku":"4038","price":602.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385431_a9df56e0-d95b-4453-97d0-48327ce8f035.jpg?v=1765816779"},{"product_id":"mcdonnell-miller-63-boiler-low-water-cut-off","title":"McDonnell \u0026 Miller 63 Boiler Low Water Cut-Off","description":"\u003cdiv\u003e\n\u003cp\u003eMcDonnell \u0026amp; Miller 63 Boiler Low Water Cut-Off delivers reliable boiler protection for steam and hot water systems. This heavy-duty mechanical low-water cutoff ensures safe operation across residential, commercial, and industrial applications. With a 1 inch threaded port connection, it installs quickly on most boiler lines and provides dependable response to water level changes.\u003c\/p\u003e \u003cp\u003eDesigned for flexible electrical performance and rugged duty, this unit supports standard voltages and boiler safety requirements. It features a robust construction with essential ratings to safeguard Your boiler system during operation.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003eType:\u003c\/b\u003e Heavy Duty\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePort Connection:\u003c\/b\u003e 1 Inch Threaded x 1 Inch Threaded\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eActuation Type:\u003c\/b\u003e Mechanical\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eDimensions:\u003c\/b\u003e 9-3\/8 Inch L × 5-1\/8 Inch W × 10-1\/2 Inch H\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eCurrent Ratings:\u003c\/b\u003e 10.2 A at 120 V AC \/ 5.1 A at 240 V AC (Full Load); 61.2 A at 120 V AC \/ 30.6 A at 240 V AC (Locked Rotor)\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eInput Supply Rating:\u003c\/b\u003e 120\/240 V AC at 60 Hz, 125 VA\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePressure Rating:\u003c\/b\u003e 50 PSI\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMedia Handled:\u003c\/b\u003e Steam, Hot Water\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eInclusions:\u003c\/b\u003e 2 switches\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eApplication:\u003c\/b\u003e Residential, Commercial, Industrial\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eStandards:\u003c\/b\u003e UL, CSA, FM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605410300126,"sku":"4022","price":804.38,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385421_afbb7c10-a686-44a0-bffb-7a2cb1bea3e7.jpg?v=1765816733"},{"product_id":"mcdonnell-miller-63m-boiler-low-water-cut-off","title":"McDonnell \u0026 Miller 63M Boiler Low Water Cut-Off","description":"\u003cdiv\u003e\n\u003cp\u003eThe \u003cb\u003eMcDonnell \u0026amp; Miller 63M Boiler Low Water Cut-Off\u003c\/b\u003e is a heavy-duty boiler low water cutoff that provides essential protection for steam and hot water systems. Featuring mechanical actuation and 1 inch threaded port connections, this unit fits a wide range of boiler configurations. Its compact footprint measures 9-3\/8\" L x 5-1\/8\" W x 10-1\/2\" H, making it ideal for residential, commercial, and industrial installations.\u003c\/p\u003e \u003cp\u003eDesigned for reliable safety and compatibility, it handles varied electrical demands with efficiency: 10.2 Amp at 120V AC \/ 5.1 Amp at 240V AC (full load) and 61.2 Amp at 120V AC \/ 30.6 Amp at 240V AC (locked rotor). The input supply rating is 120\/240 Volt AC at 60 Hz (125 Volt Amp), and the device is rated for up to 50 PSI. It is suitable for media such as steam and hot water, ensuring robust protection across boiler types. Inclusions include a manual reset and a two-switch configuration for fail-safe operation. \u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003eHeavy-duty boiler low water cutoff\u003c\/b\u003e with reliable mechanical actuation\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003e1\" threaded port connections\u003c\/b\u003e for easy installation\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eCompact dimensions:\u003c\/b\u003e 9-3\/8\" L × 5-1\/8\" W × 10-1\/2\" H\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eElectrical ratings:\u003c\/b\u003e 10.2A @ 120V \/ 5.1A @ 240V (full load); 61.2A @ 120V \/ 30.6A @ 240V (locked rotor)\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMedia and pressure:\u003c\/b\u003e supports steam and hot water up to 50 PSI\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eIncludes\u003c\/b\u003e manual reset and two-switch design\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eStandards:\u003c\/b\u003e UL, CSA, FM approved for residential, commercial, and industrial use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605410365662,"sku":"4024","price":804.38,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385423_e197628c-3ef7-4e47-9740-75a3b17f756f.jpg?v=1765816740"},{"product_id":"mcdonnell-miller-764-boiler-low-water-cut-off","title":"McDonnell \u0026 Miller 764 Boiler Low Water Cut-Off","description":"\u003cdiv\u003e\n\u003cp\u003eThe McDonnell \u0026amp; Miller 764 Boiler Low Water Cut-Off delivers reliable protection for steam and hot-water boilers. This heavy-duty mechanical cut-off prevents dangerous low-water conditions, safeguarding equipment and operations. With a 2-1\/2 inch threaded port and a compact 6.5-inch height, it fits a wide range of boiler applications—from residential to commercial and industrial systems.\u003c\/p\u003e \u003cp\u003eEngineered for 120\/240 VAC operation, it supports full-load current of 7.4 A at 120 V and 3.7 A at 240 V, with locked-rotor values of 44.4 A at 120 V and 22.2 A at 240 V. The device handles steam and hot-water media and carries UL, CSA, and FM listings for safe, compliant performance in diverse environments. Designed for pressures up to 50 PSI, it remains dependable across residential through industrial boiler rooms.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003ePort connection:\u003c\/b\u003e 2-1\/2\" threaded\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eActuation:\u003c\/b\u003e Mechanical\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eConstruction:\u003c\/b\u003e Heavy-duty boiler low-water cut-off\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eHeight:\u003c\/b\u003e 6-1\/2\"\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMedia:\u003c\/b\u003e Steam and hot water\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eApplications:\u003c\/b\u003e Residential, commercial, industrial\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eStandards:\u003c\/b\u003e UL, CSA, FM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605410398430,"sku":"4046","price":638.53,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385434_3b828c1b-8d9f-46c8-93eb-77186837da09.jpg?v=1765816801"},{"product_id":"mcdonnell-miller-pse801m-120-boiler-low-water-cut-off","title":"McDonnell \u0026 Miller PSE801M-120 Boiler Low Water Cut-Off","description":"\u003cdiv\u003e\n\u003cp\u003eThe Boiler Low Water Cut-Off, specifically the McDonnell \u0026amp; Miller PSE801M-120, protects steam and hot-water boilers with precise probe-based sensing and electronic actuation. Designed for general purpose boiler protection, this unit delivers reliable low-water detection and a straightforward manual reset for safety and serviceability.\u003c\/p\u003e \u003cp\u003eUL (Canada and US) and ASME CSD-1 compliant, it features a 7000 Ohm probe for accurate sensing and a compact enclosure suited for standard installations. The device operates at 120 VAC (50\/60 Hz, 125 VA) and handles steam up to 15 psi and water up to 160 psi. Temperature ratings span -40 to 120 F for storage, 32 to 120 F ambient, and up to 250 F for water, with humidity tolerance at 85% non-condensing. Includes a standard probe and a manual reset to simplify testing and post‑shutdown restoration.\u003c\/p\u003e \u003cul\u003e \u003cli\u003eElectronic actuation for precise, responsive low-water protection\u003c\/li\u003e \u003cli\u003eProbe-based low-water cutoff with reliable sensing (7000 Ohm)\u003c\/li\u003e \u003cli\u003eIncludes standard probe and manual reset for easy testing and reset\u003c\/li\u003e \u003cli\u003eNEMA 1 enclosure for durable boiler-room installations\u003c\/li\u003e \u003cli\u003eUL (Canada\/US) and ASME CSD-1 compliant safety performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605410431198,"sku":"279231","price":303.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00382425_27eb5643-d224-4e4e-a87d-2bdc0313240c.jpg?v=1765820777"},{"product_id":"mcdonnell-miller-rb-24e-boiler-low-water-cut-off","title":"McDonnell \u0026 Miller RB-24E Boiler Low Water Cut-Off","description":"\u003cdiv\u003e\n\u003cp\u003eThe McDonnell \u0026amp; Miller RB-24E Boiler Low Water Cut-Off is a dependable low water cutoff designed for residential boilers. With a solid-state\/electronic actuation system and a sensing probe, it protects your boiler by detecting low water levels and triggering an automatic shutdown when needed.\u003c\/p\u003e\n\u003cp\u003eFeaturing a 3\/4 Inch threaded port and compact dimensions (1-7\/8 Inch diameter x 5-3\/4 Inch length), this unit delivers reliable performance with a 2 Amp current rating and 24 Volt AC input. Its temperature rating of 120 Deg F ambient and 250 Deg F for water, along with 160 PSI water pressure, ensures safe operation across typical residential systems. The probe sensitivity of 15000 Ohm helps accurate detection, while automatic reset provides convenient reuse after the issue is resolved.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003eApplication\u003c\/b\u003e: Residential boiler protection\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eActuation\u003c\/b\u003e: Solid State \/ Electronic\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePort\u003c\/b\u003e: 3\/4\" threaded connection\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eElectrical\u003c\/b\u003e: 24 VAC input; 2 A current rating\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMedia\u003c\/b\u003e: Water\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eTemperature \u0026amp; Pressure\u003c\/b\u003e: 120°F ambient \/ 250°F water; 160 PSI\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eInclusion\u003c\/b\u003e: Automatic reset\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eCompliance\u003c\/b\u003e: UL (Canada and US)\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eProbe\u003c\/b\u003e: 15000 Ohm sensitivity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605410988254,"sku":"4190","price":158.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385596_cb8af5ae-4835-4ba9-8d85-0c2764697e94.jpg?v=1765817128"},{"product_id":"mcdonnell-miller-126400-boiler-make-up-water-feeder","title":"McDonnell \u0026 Miller 126400 Boiler Make-Up Water Feeder","description":"\u003cdiv\u003e\n\u003cp\u003eThe \u003cb\u003eMcDonnell \u0026amp; Miller 126400 Boiler Make-Up Water Feeder\u003c\/b\u003e delivers precise make-up water control for boilers, ensuring reliable operation and efficient water management. Designed for straightforward installation, this make-up water feeder uses a \u003cb\u003e3\/4 inch threaded port connection\u003c\/b\u003e and a rugged mounting flange. Its compact footprint—\u003cb\u003e14.4375 inches long\u003c\/b\u003e by \u003cb\u003e11.8125 inches tall\u003c\/b\u003e—supports robust performance in a variety of boiler rooms.\u003c\/p\u003e \u003cp\u003eKey specifications ensure dependable operation, with a \u003cb\u003etemperature rating of 120°F\u003c\/b\u003e on the inlet water and a \u003cb\u003epressure rating\u003c\/b\u003e of \u003cb\u003e150 PSI (water)\u003c\/b\u003e and \u003cb\u003e35 PSI (boiler)\u003c\/b\u003e. The unit handles \u003cb\u003ewater\u003c\/b\u003e as its media and includes a durable mounting assembly that accommodates a \u003cb\u003esix 7\/16 inch bolt holes on a 5-3\/4 inch bolt circle\u003c\/b\u003e.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003ePrimary port connection:\u003c\/b\u003e 3\/4 inch threaded\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMounting flange:\u003c\/b\u003e six 7\/16 inch bolt holes on a 5-3\/4 inch bolt circle\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eOverall dimensions:\u003c\/b\u003e 14.4375\" L × 11.8125\" H\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eTemperature rating:\u003c\/b\u003e 120°F inlet water\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePressure rating:\u003c\/b\u003e 150 PSI (water); 35 PSI (boiler)\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMedia:\u003c\/b\u003e Water\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605411414238,"sku":"3910","price":974.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385305_6229f79b-6a3e-433b-a107-ca33a9d6bf81.jpg?v=1765816438"},{"product_id":"mcdonnell-miller-221-boiler-make-up-water-feeder","title":"McDonnell \u0026 Miller 221 Boiler Make-Up Water Feeder","description":"\u003cdiv\u003e\n\u003cp\u003eThe McDonnell \u0026amp; Miller 221 Boiler Make-Up Water Feeder delivers reliable make-up water for boilers, ensuring steady feed and safe, efficient operation.\u003c\/p\u003e\n\u003cp\u003eFeaturing a \u003cb\u003e3\/4 inch threaded port\u003c\/b\u003e, this unit connects quickly to your boiler system and is rated for up to \u003cb\u003e150 PSI\u003c\/b\u003e water pressure and \u003cb\u003e35 PSI\u003c\/b\u003e boiler pressure. The inlet water temperature rating is \u003cb\u003e120°F\u003c\/b\u003e.\u003c\/p\u003e\n\u003cp\u003eIts compact footprint measures \u003cb\u003e14.4375 in L x 13.1875 in H\u003c\/b\u003e and it mounts on a flange with \u003cb\u003esix 17\/32\" bolt holes on an 8-1\/2\" bolt circle\u003c\/b\u003e.\u003c\/p\u003e\n\u003cp\u003eMedia handled is \u003cb\u003ewater\u003c\/b\u003e, making this make-up feeder ideal for commercial and industrial boiler rooms that require precise, dependable make-up water control.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003ePort connection:\u003c\/b\u003e 3\/4\" threaded\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eDimensions:\u003c\/b\u003e 14.4375 in L × 13.1875 in H\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eRatings:\u003c\/b\u003e 120°F inlet, 150 PSI water, 35 PSI boiler\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMounting:\u003c\/b\u003e six 17\/32\" bolt holes on an 8-1\/2\" bolt circle\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMedia handled:\u003c\/b\u003e Water\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605411447006,"sku":"3916","price":974.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385309_3ce57a67-36c0-4c42-9e5e-fcd44e1f9eea.jpg?v=1765816459"},{"product_id":"mcdonnell-miller-25a-boiler-make-up-water-feeder","title":"McDonnell \u0026 Miller 25A Boiler Make-Up Water Feeder","description":"\u003cdiv\u003e\n\u003cp\u003eBoiler Make-Up Water Feeder for McDonnell \u0026amp; Miller 25A provides reliable boiler feed to maintain proper water levels and protect boiler efficiency. The float-type design offers automatic makeup water control for steady, trouble-free operation.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003eDesign\u003c\/b\u003e: Float-type boiler make-up water feeder for automatic water makeup\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePort connections\u003c\/b\u003e: 3\/4\" and 1\" threaded ports for flexible installation\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eDimensions\u003c\/b\u003e: 12-1\/4\" W x 10-3\/8\" H\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eTemperature rating\u003c\/b\u003e: Up to 120°F inlet water\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePressure ratings\u003c\/b\u003e: 100 PSI (water) and 35 PSI (vessel)\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMedia\u003c\/b\u003e: Water\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThis mak-up water feeder is designed to integrate smoothly with standard boiler piping, providing consistent water addition to help maintain boiler efficiency and minimize risks of low-water conditions. Suitable for use in systems requiring accurate water makeup, it supports reliable performance across typical operating conditions.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605411774686,"sku":"3939","price":1459.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385312_e2dd1e13-88af-4c7e-9ca6-7dd7403c612d.jpg?v=1765816481"},{"product_id":"mcdonnell-miller-247-boiler-water-feeder","title":"McDonnell \u0026 Miller 247 Boiler Water Feeder","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eMcDonnell \u0026amp; Miller 247 Boiler Water Feeder\u003c\/b\u003e is a reliable mechanical water feeder for steam and hot-water boilers, delivering precise makeup water with straightforward mechanical actuation. Designed for compatibility with standard boiler rooms, it ensures steady water levels and protects boiler efficiency.\u003c\/p\u003e \u003cp\u003eKey specs include a \u003cb\u003eport connection 1\/2 inch threaded x 1 inch threaded\u003c\/b\u003e, compact dimensions of \u003cb\u003e7-5\/16 in W x 9-1\/8 in H\u003c\/b\u003e, and UL\/CSA-listed construction for safe operation. The unit supports both \u003cb\u003e120\/240 Volt AC\u003c\/b\u003e service, with full-load currents of \u003cb\u003e10.2 A at 120V\u003c\/b\u003e or \u003cb\u003e5.1 A at 240V\u003c\/b\u003e, and locked-rotor values of \u003cb\u003e61.2 A at 120V\u003c\/b\u003e or \u003cb\u003e30.6 A at 240V\u003c\/b\u003e. It accepts a standard 120\/240V, 60 Hz supply and handles up to \u003cb\u003e120°F inlet water\u003c\/b\u003e and up to \u003cb\u003e150 PSI water pressure\u003c\/b\u003e (and 30 PSI boiler pressure).\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003ePort connection:\u003c\/b\u003e 1\/2\" threaded x 1\" threaded\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eActuation:\u003c\/b\u003e Mechanical\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eDimensions:\u003c\/b\u003e 7-5\/16\" W × 9-1\/8\" H\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eElectrical:\u003c\/b\u003e 120V or 240V AC; full-load and locked-rotor current ratings listed\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMedia handled:\u003c\/b\u003e Steam, Hot Water\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePressure rating:\u003c\/b\u003e 150 PSI (water), 30 PSI (boiler)\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eStandards:\u003c\/b\u003e UL, CSA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605411872990,"sku":"3917","price":1128.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385310_36015c0c-a6fb-42d8-90b6-3a088ae2fe0f.jpg?v=1765816463"},{"product_id":"mcdonnell-miller-101a-120v-boiler-water-feeder","title":"McDonnell \u0026 Miller 101A-120V Boiler Water Feeder","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eThe McDonnell \u0026amp; Miller 101A-120V Boiler Water Feeder\u003c\/b\u003e provides precise, electric-actuated water feed to maintain boiler water levels. With a 1\/2\" NPT port connection on each side, this reliable boiler water feeder is designed for steam and hot-water systems.\u003c\/p\u003e \u003cp\u003eDesigned for easy maintenance, it features a quick-change replaceable cartridge valve and strainer, a manual feed button, and UL\/CSA certification for safety. The electric actuation delivers responsive control with a flow rate of 4 GPM at 80 PSI, making it suitable for mid-range boiler loads. Inlet water up to 120°F and a boiler pressure rating of 25 PSI (water up to 150 PSI) ensure dependable operation across standard commercial applications.\u003c\/p\u003e \u003cul\u003e \u003cli\u003ePort connections: 1\/2\" threaded x 1\/2\" threaded\u003c\/li\u003e \u003cli\u003eActuation: Electric\u003c\/li\u003e \u003cli\u003eFlow rate: 4 GPM at 80 PSI\u003c\/li\u003e \u003cli\u003eDimensions: 6-7\/8\" L × 3\" W × 7-9\/16\" H\u003c\/li\u003e \u003cli\u003eInclusions: Quick-change replaceable cartridge valve and strainer, manual feed button\u003c\/li\u003e \u003cli\u003eInput supply: 120V AC, 40 VA\u003c\/li\u003e \u003cli\u003eMedia handled: Steam and water\u003c\/li\u003e \u003cli\u003ePressure ratings: 25 PSI boiler, 150 PSI water\u003c\/li\u003e \u003cli\u003eStandards: UL, CSA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605411971294,"sku":"3838","price":650.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385288_8bdf3764-cd3d-409d-96d6-67032cc73f0e.jpg?v=1765816236"},{"product_id":"mcdonnell-miller-101a-24v-boiler-water-feeder","title":"McDonnell \u0026 Miller 101A-24V Boiler Water Feeder","description":"\u003cdiv\u003e\n\u003cp\u003eMcDonnell \u0026amp; Miller 101A-24V Boiler Water Feeder delivers precise, electric-actuated boiler feeding for reliable operation. With port connections of 1\/2 inch threaded x 1\/2 inch threaded, it installs quickly in standard piping. It offers a flow rate of 4 GPM at 80 PSI to maintain consistent water levels in steam boilers or hot-water systems. The unit runs on 24V AC (40 VA input) for safe, dependable control, and is rated for inlet water up to 120°F. Dual pressure ratings of 25 PSI on the boiler side and 150 PSI on the water side cover common boiler room requirements. Built to UL and CSA standards, it delivers dependable performance in demanding environments. Its compact footprint measures 6-7\/8 in L x 3 in W x 7-9\/16 in H, helping fit tight spaces.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003eActuation:\u003c\/b\u003e Electric\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eFlow:\u003c\/b\u003e 4 GPM at 80 PSI\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePorts:\u003c\/b\u003e 1\/2\" threaded x 1\/2\" threaded\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePower:\u003c\/b\u003e 24 VAC, 40 VA\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMedia handled:\u003c\/b\u003e Steam and Water\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eStandards:\u003c\/b\u003e UL, CSA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605412004062,"sku":"3839","price":858.25,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385289_87a2bd85-b63a-476c-920d-6652e34c2933.jpg?v=1765816238"},{"product_id":"mcdonnell-miller-47-2-boiler-water-feeder","title":"McDonnell \u0026 Miller 47-2 Boiler Water Feeder","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eMcDonnell \u0026amp; Miller 47-2 Boiler Water Feeder\u003c\/b\u003e is a dependable water feeder for boiler systems, designed to maintain precise water levels and prevent boiler damage. This model uses a mechanical actuation system and a robust port connection of 1\/2 inch threaded x 3\/4 inch threaded, ensuring compatibility with common boiler setups.\u003c\/p\u003e \u003cp\u003eEngineered for reliable operation, it handles boiler water with a temperature rating of up to 120°F and a pressure rating of 25 PSI for the boiler and 150 PSI for water lines. It supports 120\/240 Volt AC supply and offers dual-current ratings for full-load operation: 10.2 A at 120V and 5.1 A at 240V; locked rotor ratings of 61.2 A at 120V and 30.6 A at 240V. The unit measures 10-5\/8 inches in length and includes two switches for easy control and integration with safety circuits. It is designed to meet UL and CSA standards for quality and safety.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e1\/2\" x 3\/4\" port connections\u003c\/li\u003e \u003cli\u003eMechanical actuation for precise water feed\u003c\/li\u003e \u003cli\u003eDual voltage compatibility: 120\/240V AC\u003c\/li\u003e \u003cli\u003eIncludes two switches\u003c\/li\u003e \u003cli\u003e10-5\/8\" overall length; robust construction\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605412069598,"sku":"3988","price":1427.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385406_764f4411-4b3c-4a07-a89a-a53512451b28.jpg?v=1765816639"},{"product_id":"mcdonnell-miller-47-boiler-water-feeder","title":"McDonnell \u0026 Miller 47 Boiler Water Feeder","description":"\u003cdiv\u003e\n\u003cp\u003eThe \u003cb\u003eMcDonnell \u0026amp; Miller 47 Boiler Water Feeder\u003c\/b\u003e ensures automatic water feeding for steam and hot-water boilers, maintaining proper water levels and reducing manual checks. The \u003cb\u003eMcDonnell \u0026amp; Miller 47 Boiler Water Feeder\u003c\/b\u003e features mechanical actuation for reliable operation and long service life.\u003c\/p\u003e \u003cp\u003eEquipped with a 1\/2 inch threaded x 3\/4 inch threaded port connection, its compact 11-7\/8 inch body fits tight installations. It supports 120\/240 VAC power, with full-load current ratings of 10.2 A at 120V or 5.1 A at 240V, and locked rotor values of 61.2 A at 120V \/ 30.6 A at 240V. The unit handles water media at temperatures up to 120°F and boiler pressures to 25 psi (water side 150 psi). It is UL and CSA listed for safety, making it a dependable choice for commercial and residential boiler systems.\u003c\/p\u003e \u003cul\u003e \u003cli\u003ePort connection: 1\/2\" threaded x 3\/4\" threaded\u003c\/li\u003e \u003cli\u003eActuation: Mechanical\u003c\/li\u003e \u003cli\u003eOverall length: 11-7\/8\"\u003c\/li\u003e \u003cli\u003eElectrical: 120\/240 VAC, 60 Hz; full-load and locked-rotor ratings\u003c\/li\u003e \u003cli\u003eMedia and temperature: Water; up to 120°F\u003c\/li\u003e \u003cli\u003eBoiler safety: 25 psi boiler, 150 psi water\u003c\/li\u003e \u003cli\u003eCertifications: UL, CSA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605412364510,"sku":"3986","price":1192.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385405_cfaacf58-4c2a-4fd5-80c3-373637dda1c6.jpg?v=1765816634"},{"product_id":"mcdonnell-miller-wfe-120v-boiler-water-feeder","title":"McDonnell \u0026 Miller WFE-120V Boiler Water Feeder","description":"\u003cdiv\u003e\n\u003cp\u003eThe \u003cb\u003eMcDonnell \u0026amp; Miller WFE-120V Boiler Water Feeder\u003c\/b\u003e is an electronic boiler feeder designed for reliable, automatic water feed in commercial and industrial settings. This 120 VAC feeder features 3\/8 inch threaded port connections on both sides for versatile installation and a compact footprint (5-13\/16\" L x 3-1\/16\" W x 6-1\/4\" H) that fits tight control panels. Rated for dependable operation up to 175°F water and 100°F ambient, it handles water media with solid performance under boiler pressures up to 150 PSI.\u003c\/p\u003e \u003cp\u003eBuilt for rugged reliability, the WFE-120V combines a stay-clean removable strainer and a manual feed button with an adapter for flexible integration. It is UL-listed for Canada and the US, ensuring compliance with safety standards in commercial and industrial installations. The electronic actuation delivers accurate water feed control, reducing boil-off and maintaining proper boiler water levels with minimal maintenance.\u003c\/p\u003e \u003cul\u003e \u003cli\u003eElectronic actuation for precise, automatic feed\u003c\/li\u003e \u003cli\u003e3\/8\" threaded port connections (inlet\/outlet)\u003c\/li\u003e \u003cli\u003eInput: 120 VAC, 50\/60 Hz, 20 VA\u003c\/li\u003e \u003cli\u003eTemperature rating: 175°F water, 100°F ambient\u003c\/li\u003e \u003cli\u003ePressure rating: 150 PSI water, 15 PSI boiler\u003c\/li\u003e \u003cli\u003eIncludes manual feed button, adapter, removable strainer\u003c\/li\u003e \u003cli\u003eUL listed (Canada \u0026amp; US); commercial\/industrial application\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605412397278,"sku":"4267","price":384.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385826_502911fb-663c-4b64-900e-20d8c227de25.jpg?v=1765817380"},{"product_id":"mcdonnell-miller-310453-electric-water-feeder-cartridge-and-strainer-kit","title":"McDonnell \u0026 Miller 310453 Electric Water Feeder Cartridge and Strainer Kit","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eMcDonnell \u0026amp; Miller 310453 Electric Water Feeder Cartridge and Strainer Kit\u003c\/b\u003e delivers dependable boiler feed for compatible systems. As an OEM replacement, this kit works with 101-A\/847\/47\/47-2\/247\/247-2 Series Electric Water Feeders to help maintain accurate water levels and reliable operation.\u003c\/p\u003e \u003cp\u003eThe cartridge and strainer kit includes all essential components to replace worn parts in a single, convenient package. Built for durability, this replacement part provides compatibility with McDonnell \u0026amp; Miller systems and supports long-term reliability in your boiler feed setup. Whether restoring performance after maintenance or stocking spare parts, this kit keeps your equipment running smoothly.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003eIncludes:\u003c\/b\u003e cartridge and strainer components for a complete replacement\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eCompatibility:\u003c\/b\u003e 101-A\/847\/47\/47-2\/247\/247-2 Series Electric Water Feeders\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eOEM part:\u003c\/b\u003e official McDonnell \u0026amp; Miller replacement\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eDurability:\u003c\/b\u003e robust construction for long-lasting service in boiler systems\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eInstallation:\u003c\/b\u003e straightforward fit to minimize downtime\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eKeep your boiler operating at proper levels with this trusted OEM kit, designed for straightforward installation and dependable operation in commercial or residential heating systems.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605412430046,"sku":"3954","price":282.97,"currency_code":"USD","in_stock":true}]},{"product_id":"mcdonnell-miller-str-wf2-electric-water-feeder-strainer-orifice-kit","title":"McDonnell \u0026 Miller STR-WF2 Electric Water Feeder Strainer\/Orifice Kit","description":"\u003cdiv\u003e\n\u003cp\u003eSTR-WF2 Electric Water Feeder Strainer\/Orifice Kit from McDonnell \u0026amp; Miller delivers precise water feed for boiler systems. This replacement part is designed for the WF2\/WFE Series Electric Water Feeder and combines a durable strainer with an efficient orifice to ensure clean water flow and accurate feed.\u003c\/p\u003e \u003cp\u003eEngineered for easy installation, the kit protects your boiler by filtering out debris and regulating flow, helping maintain optimal pressure and extending component life. It’s a trusted, genuine McDonnell \u0026amp; Miller replacement part that supports reliable operation in commercial and residential heating setups. This kit includes all necessary seals and fittings for a tidy installation and long service life. It promotes energy-efficient operation by maintaining consistent water levels.\u003c\/p\u003e \u003cp\u003eIdeal for technicians and maintenance teams, this STR-WF2 kit offers a compact, ready-to-install solution for ongoing boiler care. Whether upgrading an aging system or stocking for service calls, this STR-WF2 kit provides a dependable, quick replacement that minimizes downtime.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\u003cb\u003eCompatible with WF2\/WFE Series Electric Water Feeders\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eIntegrated strainer and metering orifice\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eProtects boilers from debris and maintains proper flow\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eEasy installation and replacement\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eGenuine McDonnell \u0026amp; Miller replacement part\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605412495582,"sku":"78421","price":79.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385821_3d541188-25b4-40c4-a8d7-dbfd42a4451e.jpg?v=1765819858"},{"product_id":"mcdonnell-miller-fs4-15ss-flow-switch-paddle-kit","title":"McDonnell \u0026 Miller FS4-15SS Flow Switch Paddle Kit","description":"\u003cdiv\u003e\n\u003cp\u003eMcDonnell \u0026amp; Miller FS4-15SS Flow Switch Paddle Kit is a versatile, stainless steel paddle kit designed for liquid systems. This general purpose flow switch paddle kit fits the FS4-3\/FS8W\/FS250 series and includes essential hardware to get your system back online quickly.\u003c\/p\u003e\n\u003cp\u003eConstructed from stainless steel for corrosion resistance, the kit ensures reliable operation in demanding environments.\u003c\/p\u003e\n\u003cp\u003eEngineered for dependable, long-lasting performance, the FS4-15SS paddle kit supports rapid field replacement in boiler and hydronic applications. Its robust stainless steel paddle meets industry standards, delivering consistent flow sensing without sacrificing durability. Compatible with popular McDonnell \u0026amp; Miller flow switches in the FS4-3, FS8W, and FS250 families, this kit streamlines maintenance and reduces service time.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003eStainless steel construction\u003c\/b\u003e for durability and corrosion resistance\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eIncludes screw and washer\u003c\/b\u003e for easy installation\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eCompatible with FS4-3\/FS8W\/FS250 series\u003c\/b\u003e flow switches\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eGeneral purpose paddle kit\u003c\/b\u003e suitable for various liquid applications\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePrecision paddle design\u003c\/b\u003e ensures accurate flow sensing\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eChoose the FS4-15SS for a trustworthy, ready-to-install paddle kit that blends value and performance.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605412561118,"sku":"44455","price":29.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385332_0bb23e04-f3e9-45e8-86de-7da02c015d16.jpg?v=1765812306"},{"product_id":"mcdonnell-miller-fs5-1-general-purpose-liquid-flow-switch","title":"McDonnell \u0026 Miller FS5-1 General Purpose Liquid Flow Switch","description":"\u003cdiv\u003e\n\u003cp\u003eThe McDonnell \u0026amp; Miller FS5-1 General Purpose Liquid Flow Switch is engineered for reliable inline flow monitoring in boiler and hydronic systems. This 1 inch nominal size inline flow switch features threaded end connections and a durable SPDT snap switch to deliver dependable operation across a variety of fluids.\u003c\/p\u003e \u003cp\u003eWith adjustable sensitivity, it detects both low and high flow conditions and triggers alarms or control devices as needed. The unit is UL and CSA listed, and is built to endure environments from 32 to 300°F and up to 150 psi, making it versatile for many applications.\u003c\/p\u003e \u003cp\u003eElectrical performance and flow specification enable wide compatibility: current ratings of 7.4 A at 120V AC and 3.7 A at 240V AC, with an input supply rating of 125 VA at 120\/240 VAC (50\/60 Hz). Flow ranges are 1.5 to 15 GPM (flow) and 1.1 to 10 GPM (no flow), ensuring reliable activation as conditions change. This general purpose liquid flow switch is ideal for pumps, boilers, and water systems where precise flow sensing matters.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIn-Line Type\u003c\/b\u003e design for straightforward installation with threaded end connections\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eNominal size\u003c\/b\u003e 1 inch for versatile piping compatibility\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSPDT snap switch\u003c\/b\u003e contacts for flexible control\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAdjustable sensitivity\u003c\/b\u003e via calibration screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRugged and compliant\u003c\/b\u003e with UL and CSA listings and wide temperature\/pressure tolerances\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605412856030,"sku":"4119","price":372.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385579_aca0742a-fb55-44eb-a27f-076d0d612406.jpg?v=1765816974"},{"product_id":"mcdonnell-miller-fs5-3-4-general-purpose-liquid-flow-switch","title":"McDonnell \u0026 Miller FS5-3\/4 General Purpose Liquid Flow Switch","description":"\u003cdiv\u003e\n\u003cp\u003eThe McDonnell \u0026amp; Miller FS5-3\/4 General Purpose Liquid Flow Switch is an inline device designed for dependable flow monitoring in HVAC, heating, and industrial piping. It features a 3\/4 inch nominal size with threaded end connections, making it a true In-Line flow switch, and a SPDT snap switch that provides a clear on\/off signal when flow changes.\u003c\/p\u003e \u003cp\u003eElectrical ratings include up to 7.4 A at 120 VAC and 3.7 A at 240 VAC, with a 125 VA input supply rating at 120\/240 VAC (50\/60 Hz). Flow performance covers 1.5–15 GPM during flow and 1.1–10 GPM with no flow, while it handles temperatures from 32 to 300 °F and tolerates up to 150 PSI. UL and CSA listed, this unit is built for safety and reliability.\u003c\/p\u003e \u003cp\u003eA compact, robust design features low flow capacity and an adjustable sensitivity screw for precise control across different systems.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e3\/4\" nominal size with threaded end connections\u003c\/li\u003e \u003cli\u003eSPDT snap switch for reliable signaling\u003c\/li\u003e \u003cli\u003eFlow: 1.5–15 GPM (flow) \/ 1.1–10 GPM (no flow)\u003c\/li\u003e \u003cli\u003eTemperature range 32–300 °F; pressure rating 150 PSI\u003c\/li\u003e \u003cli\u003eAdjustable sensitivity screw; low flow capacity\u003c\/li\u003e \u003cli\u003eUL and CSA listed for safety and compliance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605412954334,"sku":"4120","price":372.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385580_2e8b46b3-dd41-45ba-bbd3-fa71cc09d37c.jpg?v=1765816976"},{"product_id":"mcdonnell-miller-fs4-3t1-1-general-purpose-liquid-flow-switch","title":"McDonnell \u0026 Miller FS4-3T1-1 General Purpose Liquid Flow Switch","description":"\u003cdiv\u003e\n\u003cp\u003eThe \u003cb\u003eGeneral Purpose Liquid Flow Switch\u003c\/b\u003e is a McDonnell \u0026amp; Miller FS4-3T1-1 unit featuring a paddle-type, universal design for 1-inch piping with threaded ends. This SPDT snap switch provides reliable control across heating, cooling, and process lines, delivering durable performance in demanding environments.\u003c\/p\u003e \u003cp\u003eNominal Size: 1 inch. End connections: Threaded x Threaded. Temperature rating: 32–300°F. Pressure rating: 160 PSI. Flow rate: 5–11.5 GPM (flow); 3.2–11 GPM (no flow). Electrical ratings include 7.4 A at 120 VAC and 3.7 A at 240 VAC, with an input of 125 VA at 120\/240 VAC (50\/60 Hz).\u003c\/p\u003e \u003cp\u003eDesigned for long service life, it features a sensitivity-adjustable screw, (2) electrical knock-outs, a hardened stainless steel bearing, and a sealed Monel bellows. UL and CSA listed, this flow switch integrates easily into a wide range of commercial and industrial systems.\u003c\/p\u003e \u003cul\u003e \u003cli\u003eSensitivity adjustable screw\u003c\/li\u003e \u003cli\u003eTwo electrical knock-outs\u003c\/li\u003e \u003cli\u003eHardened stainless steel bearing\u003c\/li\u003e \u003cli\u003eSealed Monel bellows\u003c\/li\u003e \u003cli\u003eUL and CSA approved\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605412987102,"sku":"4111","price":342.68,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385573_99886314-2ce9-4837-8517-dd8214b79d31.jpg?v=1765816967"},{"product_id":"mcdonnell-miller-fs4-3rp-t-general-purpose-liquid-flow-switch","title":"McDonnell \u0026 Miller FS4-3RP-T General Purpose Liquid Flow Switch","description":"\u003cdiv\u003e\n\u003cp\u003eThe General Purpose Liquid Flow Switch FS4-3RP-T by McDonnell \u0026amp; Miller is built for reliable monitoring of liquid flow in industrial piping. This paddle-style, universal switch is designed for a 1 inch nominal size with threaded end connections and a SPDT snap switch.\u003c\/p\u003e \u003cp\u003eRated for 7.4 Amp at 120 VAC and 3.7 Amp at 240 VAC, it accepts 125 Volt-Amp input at 120\/240 VAC, 50\/60 Hz. The unit handles flow from 6 to 10.2 GPM (flow) and 3.6 to 9.2 GPM (no flow), with a temperature range of 32 to 300°F and a pressure rating of 160 PSI. It incorporates a hardened stainless steel bearing and a sealed Monel bellows for durability, and includes a sensitivity-adjustable screw for precise control. UL (Canada and US) and CSA standards ensure safe, compliant operation.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003ePaddle-style, universal design\u003c\/b\u003e for versatile liquid flow detection\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSPDT snap switch\u003c\/b\u003e for reliable electrical signaling\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e1 inch nominal size\u003c\/b\u003e with threaded end connections for easy installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurable construction\u003c\/b\u003e with hardened stainless steel bearing, sealed Monel bellows, and two electrical knock-outs\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAdjustable sensitivity\u003c\/b\u003e via built-in screw for precise control\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIdeal for boiler feed, pump protection, chilled water lines, and HVAC applications, this General Purpose Liquid Flow Switch provides a dependable signal for alarms, motor controls, or valve actuation. Its rugged stainless steel and Monel components stand up to demanding environments, with UL and CSA certifications for global compatibility.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605413085406,"sku":"4109","price":288.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385571_eca9bc7c-b131-48f3-9614-40e0f12beeb0.jpg?v=1765816960"},{"product_id":"mcdonnell-miller-fs4-3s-general-purpose-liquid-flow-switch","title":"McDonnell \u0026 Miller FS4-3S General Purpose Liquid Flow Switch","description":"\u003cdiv\u003e\n\u003cp\u003eFS4-3S General Purpose Liquid Flow Switch delivers reliable paddle-based flow sensing for nominal 1 inch piping. This universal paddle-type switch features a threaded end connection and SPDT snap switch for flexible control in pumping, boiler, and HVAC applications. Designed for easy installation and maintenance. Engineered for versatility, it supports a wide operating range from 32 to 300°F and up to 160 PSI, with clear flow specifications of 6–10.2 GPM (flow) or 3.6–9.2 GPM (no flow).\u003c\/p\u003e \u003cp\u003eBuilt for durability, the FS4-3S uses a hardened stainless steel bearing and a sealed Monel bellows to resist wear in challenging liquids. Electrical ratings include 7.4 A at 120 VAC and 3.7 A at 240 VAC, with an input supply rating of 125 VA at 120\/240 VAC (50\/60 Hz). It is UL and CSA approved for North American use, ensuring reliable performance in demanding environments.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003eSensitivity adjustable screw\u003c\/b\u003e for precise activation\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eDual electrical knock-outs\u003c\/b\u003e for flexible wiring options\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eHardened stainless steel bearing\u003c\/b\u003e for longevity\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eSealed Monel bellows\u003c\/b\u003e to handle aggressive liquids\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Metropac","offers":[{"title":"Default Title","offer_id":47605413150942,"sku":"4110","price":684.44,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0034\/7102\/files\/00385572_246d4a64-52e3-47cb-9a8e-caaad0d173d4.jpg?v=1765816965"}],"url":"https:\/\/newenglandsupplyhouse.com\/collections\/mcdonnell-miller-boiler-controls.oembed?page=9","provider":"New England Supply House","version":"1.0","type":"link"}