The 3/8 in. lead-free wrot copper solder pressure female adapter is used in residential and commercial systems such as potable water, air conditioning and refrigeration. The female adapter features a solder cup and female NPT thread. These fittings provide a means for adapting a solder connection to a threaded connection. 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.