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the 300066555 refers to the valve body itself
Direct OEM Integration: Designed as a drop-in replacement for the Carrier HK05SZ003
SPST contact configuration providing reliable circuit interruption or activation based on inducer fan performance
Inspect the paddle assembly for free movement within the plumbing tee
Lochinvar & A.O. Smith 100208453 Valve 318172-701 the 300066555 refers to theThe Lochinvar & A. O. Smith 100208453 is a high capacity 1" x 1" Temperature & Pressure Relief Valve designed for critical safety management in commercial and residential hydronic heating systems. Engineered for precision performance, this T&P relief valve is rated for 200,000 BTU hr and features a fixed pressure setting of 150 PSI. As a genuine OEM replacement part, this 100208453 valve ensures exact fitment and maintains the mechanical integrity of
