Watts® 1/2-B911S-M3 Combination Fill Valve and Backflow Preventer, 1/2", Bronze

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. 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. Maximum Pressure: 100psi (6.9 bar).

• 1/2"
• Bronze
• Includes #9D backflow preventer & #1156F feed water pressure regulator in 1 pre-assembled unit
• Use in commercial & residential hydronic heating systems to provide make up water to the boiler & prevent backflow when supply pressure falls below system pressure
• Bronze body construction union solder x npt connections
• A high capacity fill valve that provides quick system filling & purging
• Meet lead free standards.

Free shipping on this item.

Returns accepted within 30 days by mail. Return shipping is paid by the customer. See our refund policy.