McDonnell & Miller 51-2-HD Control 30067439-890 The 100% solid-state design ensures

The 100% solid-state design ensures NIST traceable accuracy of ±1% full scale across all ranges

The Amana-Goodman 10728325 Limit Switch is a critical safety component designed for specific furnace applications

it is standard trade practice to use a bead of high-temperature RTV silicone on the heat exchanger mating surface if a secondary gasket is not provided

The Rheem-Ruud 60-22525-06 Gas Valve is a 1/2" NPT pilot gas valve engineered for specific residential and light commercial forced-air furnaces

filter changes

McDonnell & Miller 51-2-HD Control 30067439-890 The 100% solid-state design ensuresThe McDonnell & Miller 51 2 HD is a heavy duty head mechanism only (Part Number 135100) designed specifically for field replacement on Series 51 2 mechanical water feeders. This unit is engineered for low pressure steam and hot water boiler applications, supporting systems with a maximum vessel pressure of 35 PSI. As a specialized low water cut off (LWCO) component, it features a snap acting SPDT switch that provides simultaneous feed control and