2" Coupling Check Valve Assembly, TH150, TH250, TH400, TH750 Plug (MPT) These heavy-duty fittings are gray

These heavy-duty fittings are gray in color and made with PVC

nitrite & heavy metals

Ship Via AA300 30

so it can be shipped to any state

which is 3 times stronger than glass-bonded silca air stones

2" Coupling Check Valve Assembly, TH150, TH250, TH400, TH750 Plug (MPT) These heavy-duty fittings are grayThese units are designed to easily connect a pump that is in a skimmer or vault to a flexible or rigid PVC waterline. The check valve is important for stopping a backflow of water in the event of a power loss. Each unit has a heavy duty PVC Check Valve with a MNPT fitting that screws into the pump on one end, and a rubber coupling to connect to the water line on the other end. The table below shows which Check Valve Assemblies are compatible with