4 in. ABS Backwater Valve with Extension Kit and 8 in. Cast Iron Sewer Lid for Drainage Systems

Jones Stephens has built its reputation over the years as a leader in the plumbing industry, providing the market with thousands of products to complete any project. If you need it, we got it. ABS backwater valves prevent sewage backup in drainage systems by blocking backflow with a flapper that is forced into a closed position if sewage starts accumulating. Their stepped construction encourages water flow, and the flapper and cover have an elastomeric gasket to ensure a watertight seal. With a magnetic strip for underground detection and threaded access cover for easy inspection, maintenance is simple. With the extension kit, installers can safely bury the valve as required by code in many states. The kit includes a 16 in. sleeve, a heavy-duty cast iron lid, and an adapter. Highlights Durable ABS construction Black finish (backwater valve) and green finish (extension) 4 in. size Reduces backflow in drainage system Sockets are schedule 40 DWV Kit includes: 16 in. sleeve, heavy-duty cast-iron lid and adapter SEWER is cast into the top of lid Threaded access cover for easy inspection Magnetic strip for underground detection Flapper and cover have elastomeric gasket to ensure watertight seal Stepped construction encourages flow (minimum 1/4 in. per foot fall) 5 psi working pressure, 120⁰F working temperature