always verify your port size before brazing

Installation requires standard regulator adjustment tools

The integrated 28-inch lead wire allows for flexible routing within the burner compartment

Engineered for precise compatibility

What issues indicate a bad contactor

McDonnell & Miller 751P-MT-U-120 Control THPU32HP7Y always verify your port sizeThe McDonnell & Miller 751P MT U 120 (Part Number 176214) is a heavy duty 120Vac manual reset low water cut off engineered for reliable performance in commercial and industrial hot water and steam boilers. As a veteran grade electronic boiler safety control, this unit is fully ASME CSD 1 compliant, ensuring the burner remains locked out following a low water event or power interruption until a technician manually initiates the reset. The integrated