Abstract: An apparatus insertable into a ship deck drain for draining water from such drain includes a conduit having an outlet end and threaded inlet end, substantially tubular inflatable sleeve surrounding a portion of the conduit insertable into the drain, and a pair of collars for supporting opposite ends of the sleeve. One of the collars is threaded onto the threaded end portion of the conduit, while the other collar is attached to an intermediate portion of the sleeve portion. In various embodiments of the apparatus the sleeve takes different forms. In one embodiment, the sleeve is an enclosed, double-walled tubular bladder. The sleeve is inflated for radial expansion via a valve and valve stem in fluid communication with an airtight chamber formed by the sleeve. In one embodiment, the valve stem extends axially within the bore of the conduit, exiting the outlet end of the conduit and terminating at the valve.