PEX 1/2 Inch Barb Straight Coupling Crimp Fitting - Bag of 1 pc/Brass / 1/2" 1/2" PEX x 1/2" PEX Insert Coupling Made from lead-free brass, complies with 2014 SDWA and is approved for potable water applications. PEX x PEX couplings are used to insert into and connect two PEX pipes together.Compatible with all types and brands of PEX Tubing: Watts; Everhot; Viega; Zurn;