911
Combination Fill Valve and Backflow Preventers
Series 911 combination fill valve and backflow preventers are 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 brass Watts Model 9D backflow preventer and a bronze Watts Model 1156F feed water pressure regulator in one pre-assembled unit. Series 911 has a 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: 100 psi (6.9 bar).
Standard model has union NPT x NPT connections. Model options available with union solder x NPT, union quick-connect x NPT, and all bronze body construction union NPT x NPT connections.
Features
- 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
- Standard model has union NPT x NPT end connections
- Model options for union solder x NPT, union quick-connect x NPT, and all bronze body construction union NPT x NPT connections
- Designed for ease of installation and servicing
Literature
Select a Model
Select options below to identify the UPC, Order Code, and Repair Kit for a specific 911
No results found
Share this Product
Approval/Certification Information
For product-specific approval information, please refer to the product’s specification sheet (see literature section above) or ask a Watts representative. Some certification agencies allow you to search by product name and brand.