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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.
- A combination fill valve and backflow preventer shall be installed on the boiler feed line to provide make-up water to the boiler.
- The valve shall contain a Watts Regulator Model 9D backflow preventer and Model 1156 feed water pressure regulator.
- The combination fill valve and backflow preventer shall be a Watts Regulator Company Series 911.
- Pre-assembled for ease of installation
- Easy service accessibility
- High capacity fill valve for quick system filling and purging
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