The 90-degree union elbow features a solder cup, male NPT thread and union connection. The fitting provides a means of changing the pipeline direction 90 degrees, as well as adapting from a solder connection to a threaded connection. The union connection allows for the line to be repaired without damage. Please refer to NIBCO technical data sheets and catalogs for engineering and installation information. 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.