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This second check replacement kit is used to repair or replace the second check on a 2 1/2 to 3 inch lead free lead free double check detector assembly and is used to prevent the backflow of contaminated water into the potable water supply. It consists of a seat, seat O-ring, disc assembly, and spring, check cage and cover O-ring. It is ideal at referenced cross-connections identified as non-health hazard applications.
Second Check Kit for 2 1/2 to 3 IN Lead Free Double Check Detector Assembly