COUPLINGS FOR METAL TUBES AND PIPES; COUPLINGS FOR RUBBER HOSE; LEVEL CONTROL VALVES; SELECTOR VALVES; NEEDLE VALVES; CHECK VALVES, SHUTTLE VALVES, PRESSURE RELIEF VALVES, PLUG VALVES, VALVES FOR CONTROLLING HYDRAULIC CYLINDERS AND SERVO-MOTORS, VALVES FOR REFUELING AND DRAINING FUEL AND OIL TANKS OF AIRCRAFT AND TANK TRUCKS FROM BENEATH, DRAIN COCKS MANIFOLD PIPES AND PIPE FLANGES.