Watts 957-NRS-GXG 4 - Part of the 957 Series ZA100F-3NH Relief Valve Piston Assembly Kit

Relief Valve Piston Assembly Kit Type Complete Rubber Parts Kit Lead Free Yes UPC - 098268127782

Epoxy-coated cast-iron body with anchor flange for durable installation

BG-FILCOTEN drains combine the features of a stable concrete channel with the strength and durability of high-performance concrete and engineered for high-load capacity

a 10⅛″ diameter fixed top

heel-proof grate secured with vandal-proof stainless steel screws

Watts 957-NRS-GXG 4 - Part of the 957 Series ZA100F-3NH Relief Valve Piston Assembly KitThis 4 IN lead free stainless steel reduced pressure zone assembly backflow preventer has NRS groove by groove gate valves that work well in limited headroom situations. Ideally suited for referenced cross connections identified as health hazard continuous pressure applications, it prevents the backflow of contaminated water into the potable water supply and protects against backsiphonage and backpressure. The easy maintenance assembly consists of