The 1/4-inch x 1/4-inch wrought copper solder female adapter is used in residential and commercial systems such as potable water, air conditioning and refrigeration. The 1/4 inch x 1/4 inch female adapter features a solder cup (sweat)and female NPT thread. These fittings provide a means for adapting a solder connection to a threaded connection. In addition to its inherent qualities of beauty, durability and low maintenance, copper's reusability makes it an ideal application in sustainable projects.