McDonnell & Miller 63 Boiler Low Water Cut-Off

McDonnell & 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.

Designed 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.

• Type: Heavy Duty
• Port Connection: 1 Inch Threaded x 1 Inch Threaded
• Actuation Type: Mechanical
• Dimensions: 9-3/8 Inch L × 5-1/8 Inch W × 10-1/2 Inch H
• Current Ratings: 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)
• Input Supply Rating: 120/240 V AC at 60 Hz, 125 VA
• Pressure Rating: 50 PSI
• Media Handled: Steam, Hot Water
• Inclusions: 2 switches
• Application: Residential, Commercial, Industrial
• Standards: UL, CSA, FM