NIBCO PressACR fittings are the fastest, easiest way to join copper tubing systems. NIBCO® PressACR fittings are designed to join with seamless copper water tube in aira conditioniong and refrigeration applications systems. The press fittings can also be installed underground. The NIBCO® PressACR 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 andmore installation information. NIBCO® PressACR applies the proven performance of press technology to NIBCO high pressure ACR fittings. NIBCO® PressACR fittings features a full range of precision engineered copper fittings, accessories, pressing tools and jaws. In addition to its inherent qualities of beauty, durability and low maintenance, copper's reusability makes it an ideal application in sustainable projects. NIBCO® PressACR copper fittings are backed by a 5-year limited warranty. Because of its longstanding reputation for innovation and precision in design and manufacturing, NIBCO is the preferred brand in the industry. less