Whale quick-connect fittings produce high-integrity, reliable plumbing systems specifically designed for easy installation and re-usability of components. Features:• Durable brass construction• Unique Double-Gripper design provides secure lifelong tube retention• No collet clips are necessary, thus fittings reduce costs and installation time• Collet has internal support ring ensuring O-ring seal is held in position without leaking• Outer sleeve incorporates collet cover, thus preventing accidental tube release• System is rated at 180 PSI at 68°F and 90 PSI at 150°F• Intended for cold and hot water Double-Gripper design increases tube retention Intended for cold and hot water | Whale Stem NRV Male Adapter With 1/2" NPT