1/2" Backflow Preventer & Fill Valve (0386462)

WA911S MFG #: 911S-1/2
Series 911 combination fill valve and backflow preventer consists of a Model 9D backflow preventer and Model 1156F feed water pressure regulator in one pre-assembled unit. This valve is designed for use on boiler feed lines to provide make-up water to the boiler and prevent backflow when supply pressure fails below system pressure.
  • Features
  • Pre-assembled for easy of installation
  • Easy service accessibility
  • High capacity fill valve for quick system filling and purging