Plastic Valve, Plastic Fittings, Plastic Pipes manufacturer / supplier in China, offering PVC Octagonal Ball Valve Socket Thread 1/2''-4'' Pn10 for Industrial Water and Irrigation, Industrial PVC Wafer Check Valve 3''-12'' Non-Return Valve with EPDM Seal for Water Treatment, 3/4''-6'' PVC Swing Check Valve Pn16 Socket Thread Non-Return Valve for Water Treatment DIN/ ANSI and so on.