Watts 0794025|WW0794025 - RK 709 DCDA CK1 4 LF LEAD FREE

This first check valve kit is used to repair or replace the first check on a 4 inch lead free double check detector assembly and used to prevent the reverse flow of polluted water from entering into the potable water supply. This kit consists of a disc assembly, spring and a cover O-ring. It is ideal at referenced cross-connections identified in non-health hazard applications.