Watts® 1/2-B911S-M3 Combination Fill Valve and Backflow Preventer, 1/2", Bronze Eco_Friendly Size: # 2 CS

Size: # 2 CS

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Watts® 1/2-B911S-M3 Combination Fill Valve and Backflow Preventer, 1/2", Bronze Eco_Friendly Size: # 2 CSUse in commercial and residential hydronic heating systems to provide make up water to the boiler, and prevent backflow when supply pressure falls below system pressure. It consists of a bronze Watts Model 9D backflow preventer and a bronze Watts Model 1156F feed water pressure regulator in one pre assembled unit. High capacity fill valve that provides quick system filling and purging. It is designed for use in the boiler feed lines of hydronic