This unit features a manual hi-lo adjustment range of 1

The 100165923 provides the precise flame sensing continuity required by the smart valve or control board to maintain the gas valve circuit

the 55440 disc is ground and lapped to exacting tolerances to ensure a positive shut-off and long-term condensate removal efficiency

thermostat harnesses

Always consult the 179316 installation manual to confirm settings for your specific altitude and model size

McDonnell & Miller 63 Low Water Cut Off Freon This unit features a manualThe McDonnell & Miller 63 Low Water Cut Off (Part Number 142400) is a heavy duty, float operated safety control designed for residential, commercial, and industrial boiler applications. This mechanical LWCO is specifically engineered for use with both hot water and steam boilers, providing a critical layer of protection against dry fire conditions. Featuring a 1" NPT threaded connection for equalizing pipes, it is rated for a maximum boiler pressure