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911

Combination Fill Valve and Backflow Preventers

  • For use in hydronic heating systems boiler feed lines to provide make up water and prevent backflow
  • High capacity fill valve for quick system filling and purging
  • Designed for ease of installation and servicing
  • Union NPT x NPT or union solder x NPT connections

Select a Model

Select options below to identify the UPC, Order Code, and Repair Kit for a specific 911

Approval/Certification Information

For product-specific approval information, please refer to the product’s specification sheet or ask a Watts representative. For general information regarding any approval certification partners identified in the specification sheet, please visit our certification partners’ websites:


ASSE CSA FM Approvals NSF
UL ULC USC WQA