WW0886015, Watts, 1/2-1 1/4 Backflow Dual Check Repair Kit, 7

This 1/2-1 1/4 IN dual check valve repair kit for series 7 prevents the reverse flow of polluted water from entering into the drinking water supply at the service entrance or at individual outlets. It consists of first and second check modules, 2 modules O-rings, union seal and check seal. It is designed for non-health hazard residential water system containment, continuous pressure applications. It is installed immediately downstream of the residential water meter, in a vertical or horizontal position. Check with local inspection authorities for installation requirements.