This PEX coupling fitting is a perfect match for Nibco PEX tubing and potable use. Can be used in hot and cold water plumbing system. Maximum pressure 80 PSI. SharkBite End 1 Diameter: 3/4 in. End 1 Type: Barb End 2 Diameter: 3/4 in. End 2 Type: Barb Material: Poly Alloy Product Type: Coupling Average Lead Content: Lead-Free ANSI Certified: Yes Push to Connect: No Maximum Pressure: 160 psi Packaging Type: Bagged Maximum Temperature: 200 F Number in Package: 5 pk Minimum Pressure: 80 psi.