WW0887941, Watts, 4 Backflow Rubber Repair Kit, Single Check, Series 709Dcda

This 4 IN single check valve rubber parts repair kit for series 709DCDA helps to prevent the reverse flow of polluted water from entering into the potable water supply. This kit consist of a disc and a cover O-ring. It is ideal at referenced cross-connections identified in non-health hazard applications. Check with local inspection authorities for installation requirements.