APXE3434 3/4" BRASS ELBOW PEX | Apollo PEX lead-free dezincification-resistant brass elbows are the premier low-cost solution for connections within a PEX piping system. Apollo PEX fittings are suitable for both potable water and hydronic heating systems. Apollo PEX fittings may be used with copper crimp rings, stainless steel pinch clamps or stainless steel crimp sleeve all sold separately.