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The primary physical update is the transition from a traditional control knob to a more durable integrated ON-OFF switch
the 100165854 is strictly for natural gas water heaters
and Luxaire systems for a drop-in replacement
Reliable 25-35 mV open circuit voltage for consistent flame proving
Belimo B254 Ball Valve R-410A The primary physical update isThe Belimo B254 is a professional grade 2 way characterized control valve designed for precision modulation in hydronic systems. Featuring a 2 inch NPT connection and a robust 240 Cv rating, this valve is engineered for high flow chilled or hot water applications. The assembly utilizes a nickel plated forged brass body integrated with a 304 stainless steel ball and stem to ensure long term durability and resistance to scaling. Its equal percentage