WW0887091, Watts, 4 Backflow Repair Kit, First Or Second Check, Cover O-Ring, Bolt O-Ring, Disc, 770

This 7 IN check rubber parts replacement kit for series 770 is designed to protect drinking water supplies from dangerous cross-connections in accordance with national plumbing codes and water authority requirements. This kit consists of a cover O-ring, bolt O-ring and a disc for one check. Check with local inspection authorities for installation requirements.