Watts B911, 1/2" Bronze Combination Fill Valve & Backflow Preventer (NPT x NPT)

Note: Do not use this item for any installation or repair of potable water applications. This product does not comply with the "Safe Drinking Water Act," which requires that products meet low-lead standards in order to be used in systems providing water for human consumption (drinking or cooking). This item is for non-potable (non-human consumption) water applications only. 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, for use in commercial and residential hydronic heating systems, 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: Pre-assembled for ease of installation Easy service accessibility High capacity fill valve for quick system filling and purging All bronze body construction union NPT x NPT connections