NIBCO press fittings are the fastest, easiest way to join copper tubing systems. NIBCO® PressG fittings are designed to join with seamless copper water tube in residential and commercial gas and compressed air systems. The press fittings can also be installed underground. NIBCO® PressG fittings are user friendly, quick and easy to install. When properly crimped a unique "N" witness mark is clearly visible. Please refer to NIBCO technical data sheets and catalogs for engineering and installation information. NIBCO® PressG fittings features a full range of precision engineered copper and copper alloy fittings, commercial valves, accessories, pressing tools, jaws and chains. In addition to its inherent qualities of beauty, durability and low maintenance, copper's reusability makes it an ideal application in sustainable projects. NIBCO® PressG copper fittings are backed by a 50-year limited warranty. Because of its longstanding reputation for innovation and precision in design and manufacturing, NIBCO is the preferred brand in the industry.