Oatey Backwater Valve 4 In.

Oatey Backwater Valves are designed as a sewage check valve to prevent pumped water from flowing back into the basin. Assembly includes threaded cover to allow for access and valve flapper which seals closed while not in use. Threaded access cap incorporates a neoprene seal for positive sealing and can be tightened or removed by hand. Made of PVC or ABS plastic, backwater valve can be solvent welded to piping. Oatey Backwater Valves can accommodate access sleeves made of Schedule 40 pipe.