McDonnell & Miller 750-T-120 Boiler Low Water Cut-Off

The McDonnell & Miller 750-T-120 Boiler Low Water Cut-Off is a critical safety device for steam and hot water boilers. This electronic actuation unit detects low water conditions and safely shuts down the boiler to prevent damage. Built for commercial and industrial systems, it delivers reliable protection in demanding environments.

Designed to meet UL (Canada and US) listing and ASME CSD-1 compliance, this low water cutoff combines rugged construction with precise protection. The unit supports a 120V AC supply and is built to withstand industrial workloads, delivering dependable performance where it matters most.

Key specifications and features ensure easy installation and safe operation across boiler rooms:

• Actuation: Electronic
• Input Power: 120 VAC, 50/60 Hz
• Current Rating: 7.5 A full-load; 43.2 A locked rotor
• Media Handled: Steam and Hot Water
• Enclosure: NEMA 1
• Standards: UL (Canada and US); ASME CSD-1
• Sensitivity: 20,000 Ohm
• Environment: Humidity 85% non-condensing; Operating ambient 32–120°F; Storage -40 to 120°F
• Inclusions: Manual Reset
• Applications: Commercial, Industrial, General Purpose