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2520 3/4 check valve brass products are offered for sale by suppliers on Alibaba.com, of which check valves accounts for 46%. A wide variety of 3/4 check valve brass options are available to you, such as normal temperature, medium temperature and high temperature.You can also choose from stainless steel, alloy and aluminum alloy 3/4 check valve brass,as well as from black, white, and silver 3/4 check valve brass,and whether 3/4 check valve brass is screw, or air vent.