The repair coupling features solder cups and no stop. The fitting provides a means to connect/repair two lengths of tube. In addition to its inherent qualities of beauty, durability and low maintenance, copper's reusability makes it an ideal application in sustainable projects. NIBCO copper fittings are manufactured in an ISO 9001 certified facility and 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.