B911S Watts 1/2" Sweat Brass Union High Capacity Combination Fill Valve And 1/2" IPS Backflow Preventer With Atmosperic Vent 100 PSI

• 1/2 Inch union solder inlet x NPT threaded outlet connections
• High capacity fill
• Maximum pressure 100 psi
• All bronze body construction with solder connection
• Pre-assembled unit
• For use in commercial and residential hydronic heating systems

Specification Sheet

This 1/2 inch bronze combination fill valve and backflow preventer is 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 backflow preventer, model 9D and a bronze feed water pressure regulator, model 1156F, in one pre-assembled unit. The high capacity fill valve provides quick system filling and purging. It is designed for use in the boiler feed lines of hydronic heating systems and has 1/2 inch union solder inlet x NPT threaded outlet connections. The maximum pressure is 100 psi (6.9 bar).