Watts RK-909-CK2-6 Backflow Preventer Second Check Valve Kit

The Watts RK-909-CK2-6 Backflow Preventer Second Check Valve Kit (Part No. 0887217) is an OEM repair kit designed to restore second-check operation in 6-inch Watts 909 RPZ backflow preventers. It includes the disc assembly, spring, and cover O-ring for internal repair of the existing unit, enabling preventive maintenance for potable-water systems. Compatible with Watts 909 RPZ backflow preventers of 6 inches, this kit is widely used to service commercial buildings, industrial plants, municipal water systems, irrigation networks, hospitals, schools, and fire-protection systems. Lead status: standard RK series; a lead-free equivalent is available as LFRK 909-CK2-6.