US Patent 8001627 Portable main drain for a pool of water

A portable main drain utilizing top and bottom walls with an attached flexible conduit for the removal of debris from bodies of water, ponds or spas, which operates with suction at the cleaner suction port and/or the skimmer from the circulation pump. The bottom wall has four cork feet to support the portable main drain. A flow regulator is positioned where the flexible conduit connects to the suction port. The top wall contains an internal annular wall projecting downwardly to form a flow-regulating gap with the bottom wall to thereby divide the water flow at about 30% from the ports in the bottom wall into a manifold that is supplied with the remaining portion of water by the ports in the top wall.