Abstract: A device for vacuuming debris from the bottom of a pool of water. The device comprises a housing which forms a frustoconical cavity having a mouth on the lower surface and an exit hole on the top of the frustoconical cavity. A hose is attached on one end to the exit hole and in fluid connection with a source of vacuum.

Abstract: A device for vacuuming debris from the bottom of a pool of water. The device comprises a housing which forms a frustoconical cavity having a mouth on the lower surface and an exit hole on the top of the frustoconical cavity. A hose is attached on one end to the exit hole and in fluid connection with a source of vacuum.

Abstract: A spring clip fastener for pressing into the cavity of cavity walling to hold insulation firmly in place comprises a rigid plate having at least one spring strip bowed from its plane. The bowed spring strip or strips bias the insulation within the cavity against one of the walls. Each bowed strip has a groove across it to engage a horizontal restraining bar which may be provided by a tie between the walls of the cavity walling. When the restraining bar in engaged it is difficult for the fastener to slip out of position.