The quick, clean, and easy way to install toilets. Fernco’s Wax Free Toilet Seal is the only toilet seal that allows you to “feel the seal”. As you lower the toilet onto the flange, you can feel the unique sealing ribs compress and seal against the inside walls of the drain pipe. No mess and no guess – just the confidence in a reliable seal. The FTS-3 is designed to fit the inside diameter of 3” drain pipe.