25-inch shaft diameter

This OEM replacement kit ensures precise flame rectification and reliable ignition in systems requiring a 131457H9 configuration

Can this kit be used for high-altitude installations

the 421-BT636 streamlines field repairs by matching the footprint and electrical specifications of legacy Beckett oil burner transformers

Lochinvar & A.O. Smith 100109259 Valve 318820-201 25-inch shaft diameterAs an HVAC industry standard, the Lochinvar & A. O. Smith 100109259 Valve is a critical safety component designed for high performance water heating systems. This 3 4" T&P Valve is engineered to protect residential and commercial boilers by managing both thermal expansion and internal pressure. With a factory set 150 PSI pressure relief and a 210F temperature relief threshold, this valve ensures fail safe operation when system variables exceed safe