Watts Automatic Fill Valve for Hot Water Boiler, B911S-M3
Watts Automatic Fill Valve for Hot Water Boiler, B911S-M3
Key features
- For use in boiler feed lines in hydronic heating systems
- Combination feed water pressure regulator and backflow preventor
- Quick system filling and purging
- All bronze construction
- 1/2 in. union solder inlet x NPT threaded outlet connection
Watts B911S-M3 Automatic Fill Valve for Hot Water Boiler is a combination fill valve and backflow preventer for use in the boiler feed lines in commercial and residential hydronic heating systems. It provides make-up water to the boiler and prevents 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 a single pre-assembled unit. The high capacity fill valve provides quick system filling and purging. Size is 1/2 in. union solder inlet x NPT threaded outlet connections. The maximum pressure is 100 psi.
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