Fix your copper pipe with the Mueller 1 in. Copper Coupling Less Stop. This copper fitting is constructed of Wrot Copper for long lasting durability and strength. The design meets all applicable plumbing standards.|A solid fitting with female threads on the inside of both ends. It is used for joining two lengths of pipe together that are not locked in place and can be turned.|For use in pressure applications.|WROT copper construction.|Easy to join and install.