Flood-Guard 4 In. Float Gasket is a reliable defense against sewer back-ups, designed to safeguard your property and prevent messy clean-up jobs. This product operates as an effective check valve, ensuring that water back-up caused by overloaded sewers doesn’t create havoc in your home. Under normal conditions, water flows seamlessly through the drain, but when the sewer starts to back up, Flood-Guard’s smart float mechanism comes into action. The float rises, sealing off the drain opening and preventing any water from entering your living space until the water recedes. Installing the Flood-Guard is a breeze and requires only a screwdriver and a couple of minutes of your time. Once in place, you can have peace of mind knowing that your property is protected from potential water damage caused by sewer back-ups. To lasting durability, the gaskets are made of molded rubber, and all metal parts are either plated or made from stainless steel. This construction ensures that the Flood-Guard is resistant to corrosion, providing you with a reliable and long-lasting solution. Model Number: 4FH