Series RK-8 hose connection vacuum breaker repair kit consists of a diaphragm assembly, gasket washer and one O-ring. This hose bibb is ideal for inside and outside, health hazard installations requiring non-continuous pressure such as service sinks, swimming pools, photo developing tanks, laundry tubs, wash racks, dairy barns, marinas, and general outside gardening uses. Check with local inspection authorities for installation requirements.