supporting a system static pressure up to 400 psi and fluid temperatures between 32° and 200°F

and York systems

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 supporting a system static pressureThe 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