PEX x PEX couplings are used to connect two PEX pipes together. (100) 3/4" PEX x 3/4" PEX Couplings. Standards & Certifications Crimp Connection System (PEX Crimp Tool + Copper Crimp Rings);. Manufactured to ASTM standard F1807 and compatible with any SDR-9 (U.S. standard) PEX tubing.
eBay