Do I Need A Backwater Valve? | Out Of This World Plumbing

We’ve got the sewer line fully exposed and ready for a backwater valve install. After cutting out the old section, we repositioned the pipe so the valve can sit perfectly centered in the space. Getting the placement and level exactly right is critical — if it's off, the check valve won’t function properly during a backup. With everything aligned, we secured the valve to the building drain, tightened the clamps, and made sure the system is sealed and ready. And just in time, the helper has return

Backwater Valves | How They Work, Costs and Repairs | Square One

RectorSeal 97024 Clean Check 4" PVC Extendable Backwater Valve

RectorSeal 97023 Clean Check 3" PVC Extendable Backwater Valve

Sentinel Drain Guard Sewer Backflow Preventer for 3" and 4" Drains (Backwater Valve) - CSA Approved