The ProPEX Lead-free (LF) Brass Elbow (1/2 in. PEX x 1/2 in. male copper) makes secure, 90-degree connections to transition Uponor PEX-a pipe to copper piping systems. Use in hot and cold domestic potable water systems, residential fire sprinkler systems, hydronic distribution piping, and radiant heating and cooling systems. One end of the elbow features the durable, reliable Uponor ProPEX fitting for connections to Uponor PEX-a pipe, and the other end features a male copper connection. The ProPEX connection system eliminates torches, glues, solvents, dry fits, and fire watch requirements from a jobsite. Note that the ProPEX connection requires the use of a ProPEX expansion tool and ProPEX rings (sold separately).