B911, B911S Bronze Combination Fill Valve and Backflow Preventer
Series B911, B911S Bronze Combination Fill Valve and Backflow Preventers are for use 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. Model B911 has union NPT x NPT connections. Model B911S has union solder x NPT connections. The Series B911, B911S has a high capacity fill valve that provides quick system filling and purging. It is designed for use in the boiler feed lines of hydronic heating systems.
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** Territory restrictions apply for most products.
to 100 psi
Union Solder, Threaded
See product datasheet for additional details