Sioux Chief 869-S4P 4 PVC ProCheck Backwater Valve

This 4″ ABS check valve backwater is a less extension device that is designed to prevent any unwanted backup in sewer lines. It features threaded access seals that are hand tight, and allow easy maintenance and inspection. This valve allows unrestricted flow in the downstream direction but closes and prevents the reverse flow of water back into the sewer system. Grab it here now, here at PlumbersStock.