WATTS® 0386462 911 Combination Fill Valve and Backflow Preventer, 1/2 in Nominal, Union Solder x NPT End Style, Bronze Body, Domestic

WA911S MFG #: 911S-1/2
  • Body Material: Bronze
  • Country of Origin: US
  • Dimensions: 8-1/2 in L x 5-1/4 in H
  • Domestic/Import: Domestic
  • End Style: Union Solder x NPT
  • Manufacturer Name: Watts Water Technologies
  • Nominal Size: 1/2 in
  • Pressure Rating: 100 psi
  • Series: 911
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 and More


  • Pre-assembled for easy of installation
  • Easy service accessibility
  • High capacity fill valve for quick system filling and purging


  • Commercial and Residential


  • PROP65: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm.


  • 1 year Limited