not for powering a millivolt thermostat circuit which requires a thermopile

Key Benefits OEM Compatibility: Exact replacement for Heil Quaker 1008725 and ICP models including C8MPL100F20A1 and H8MPN100F14A1

Chemical Resistance: Equipped with NBR (Buna-N) seals for excellent compatibility with air and fuel gasses

which is standard for most residential 24V gas valves found in HVAC repair scenarios

Spirax-Sarco 55224 Main Valve Refrigerant not for powering a millivoltThe Spirax Sarco 55224 is a 1 inch NPT cast iron main valve engineered for precision high capacity steam regulation in industrial environments. Built as the cornerstone of the Spirax Sarco 25 series, this pilot operated pressure regulator provides exceptional stability and dead end shutoff (ANSI Class IV) across varying upstream pressures. As a seasoned technician knows, the versatility of the 55224 main valve lies in its modularitysimply pair it with