This immersion temperature controller is essential for contractors requiring an L4006A equivalent for high-limit protection in commercial or residential boiler applications

and York systems

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

What is the physical diameter of a #54 orifice

the SEC99AA-24 armored capillary (identical to SEC99AA-24C) is a reliable solution for connecting pressure-actuated controls

McDonnell & Miller 63 Low Water Cut Off Freon This immersion temperature controller isThe 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