Spirax-Sarco 54663 Main Valve R-22 This veteran-grade 1/2" NPT brass

This veteran-grade 1/2" NPT brass solenoid valve features a high-performance EPDM diaphragm

as a complete inducer motor assembly

The unit comes equipped with a 1/8" NPT straight barbed fitting

making it an ideal choice for direct retrofit or new installations

Drips from the showerhead when the handle is in the off position also indicate a worn valve seat within the cartridge

Spirax-Sarco 54663 Main Valve R-22 This veteran-grade 1/2" NPT brassThe Spirax Sarco 54663 is a 4 inch ANSI 125 flanged main valve engineered for precision in high capacity steam distribution systems. As a core component of the 25 Series, this pilot operated pressure reducing valve (PRV) utilizes a self actuated design, leveraging downstream pressure feedback via an external sensing line to modulate flow. This cast iron unit is built for heavy duty service, featuring stainless steel internals and a fatigue tested