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945 1/2 pvc check valve products are offered for sale by suppliers on Alibaba.com, of which check valves accounts for 42%. A wide variety of 1/2 pvc check valve options are available to you, such as normal temperature, medium temperature and high temperature.You can also choose from stainless steel, carbon steel and aluminum alloy 1/2 pvc check valve,as well as from black, white, and silver 1/2 pvc check valve,