McDonnell & Miller 157S MD Pump Controller THPU32HP7Y the kit comes standard with the kit comes standard with two porcelain wire nuts allowing you to fine tune the system's performance after installation This is specifically designed for boilers with rapidly fluctuating water lines to prevent the burner from cutting off prematurely due to momentary surges or "hunting" in the water column Dual Function Reliability: Operates as both a pump controller and a low water cut off (LWCO) with an alarm actuation circuit
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McDonnell & Miller 157S-MD Pump Controller THPU32HP7Y the kit comes standard with