2-1/2 45° Elbow Copper x CopperThe 45 Solder Joint Elbow, 2 1 2" C x 2 1 2" C, is a critical pipe fitting used to change the direction of piping systems by 45 degrees. With 2 1 2" copper connections on both ends, this elbow fitting is specifically designed for use in copper piping systems. The solder joint design allows for a strong, leak resistant connection when soldered, making it ideal for residential, commercial, and industrial plumbing, HVAC, and heating systems.