Check valve Wikipedia
Ball check valves are often very small, simple, and cheap. They are commonly used in liquid or gel minipump dispenser spigots, spray devices, some rubber bulbs for pumping air, etc., manual air pumps and some other pumps, and refillable dispensing syringes. Although the balls are most often made of metal, they can be.
WaStop® Check Valve System Hynds
Wastop® is a unique patented check valve that stops backflow in drains. Wastop® gives reliable protection against infiltration of the pipeline by insects, small .. Rubber seal. Expansion bolt. Existing pipe. Flow direction. Rubber seal. In manhole option 1. Joint coupling. Existing pipe. Flow direction. In manhole option 2.Get Price