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3" Flood-Guard™ Sewer Flood Protection Valve
For minor to moderate back situations
A Check Valve For Your Floor Drain
Water flows normally through the drain until sewer starts to backup
Seals off the drain when water threatens from below
Opens back up automatically when water recedes
Rubber Float & Stainless Steel Construction
Corrosion-resistant design to extend drain life
Easy Installation - Just A Screwdriver & Few Minutes