Abstract: A valve for permitting fluid flow in a first desired direction and preventing fluid flow in a reverse direction. The valve includes a valve body having a rigid wall defining inlet and outlet openings at opposite ends thereof and a main flow passageway between the inlet and outlet openings. Secured to the rigid wall, so as to receive fluid entering the passageway through the inlet opening, is a tubular valve member of elastomeric material having upstream and downstream ends in fluid communication with one another. The tubular valve member is normally open to fluid flow but is yieldingly collapsible in response to downstream pressure increases to prevent fluid from passing therethrough. A ring is secured about the tubular valve member and is dimensioned to prevent the passage of the downstream end through the inlet opening in the event of a downstream pressure increase. The drain control valve may be employed in conjunction with a novel manifold for irrigation purposes.

Abstract: An overflow control unit for a washing machine which interconnects the drain hose of the washing machine to a stand-pipe is provided which comprises a cylindrical plug device having a central axially extending passageway therethrough and a by-pass valve interconnecting the passageway of the cylindrical plug with the atmosphere, the by-pass valve having an open and a closed position. In one embodiment the overflow control unit is operatively connected to a pressure switch so that upon a build-up of water pressure within the stand-pipe due to the drain being obstructed the switch is activated to break the electrical circuit to the washing machine.