the included ceramic wire nuts allow for a professional cut-and-strip connection to legacy harnesses

making it ideal for managing compressor cycling

Industrial Grade Insulation: Designed to withstand the thermal stress of continuous flue gas extraction

Standard Barb Connectivity: Features a 1/4" barb for quick and secure attachment to existing pressure switch hoses

McDonnell & Miller 61-HD Low Water Cut Off Refrigerant the included ceramic wire nutsThe McDonnell & Miller 61 HD (Part Number 140300) is a heavy duty mechanical low water cut off designed specifically for low pressure steam boiler applications. This head mechanism serves as a direct replacement component for Series 61 controllers, facilitating reliable burner circuit interruption when water levels drop below the safe line. Rated for a maximum steam pressure of 20 PSI, the 61 HD utilizes a high buoyancy float operated mechanism to