Abstract: A sealing mechanism for a floor drain where an opening in the floor is located in the vicinity of a liquid drain conduit beneath the floor. The mechanism uses a connecting conduit which communicates with the drain conduit beneath the floor and includes a first gasket member which fits within the opening and around the connecting conduit. The first gasket member has a wall circumjacently spaced from the conduit and connected to an endless loop also circumjacently placed with respect to the connecting conduit. A second gasket member is sized for circumjacent placement with respect to the connecting conduit and includes wedging means for forcing the first wall of the first gasket member against the side portions of the drain opening to effect sealing between the conduit and the side portions of the drain opening.