As a veteran-grade OEM Reznor replacement part

the valve body requires any standard Sporlan MKC-2 coil for operation

0 Cv flow coefficient provides precise regulation for terminal unit applications like fan coils and baseboards

Is this part compatible with older FSA2X models

and bucket mechanism

Watts 0163765 Valve 326058-757 As a veteran-grade OEM ReznorThe Watts 0163765 is a professional grade 40XL 7 150 series automatic reseating temperature and pressure relief valve, engineered for high output commercial water heater applications. Featuring a rugged bronze body with a 1 inch MNPT inlet and FNPT outlet, this valve provides critical safety protection for large scale hot water supply tanks. Designed with a massive 2,134,000 BTU steam discharge capacity, it ensures reliable ASME rated and CSA listed