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420 3/4 pex coupling products are offered for sale by suppliers on Alibaba.com, of which pipe fittings accounts for 85%, plastic tubes accounts for 1%. A wide variety of 3/4 pex coupling options are available to you, such as oem, odm and obm.You can also choose from forged, injection and molding 3/4 pex coupling,As well as from stainless steel, carbon steel 3/4 pex coupling, and whether 3/4 pex coupling is hexagon, glue, or push in.