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which distinguishes the 157A series from the standard 157 series (1 inch NPT)
Does this unit support automatic or manual reset
including specific Trane CSHA and Copeland ZR series units
Its resilient construction ensures long-term efficiency in water treatment
Lochinvar & A.O. Smith 100109674 Control Valve 322838-753 which distinguishes the 157A seriesThe Lochinvar & A. O. Smith 100109674 is a direct replacement natural gas control valve engineered for high efficiency commercial and residential water heating systems. Effectively replacing the legacy part number 9004028105, this valve serves as the primary gas pressure regulator and safety shut off mechanism. It is designed to handle specific BTU input ratings while maintaining precise manifold pressure to ensure stable combustion. In the field,
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