Apollo PEX leadfree dezincificationresistant brass couplings 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 Available in a variety of configurations and sizes, completion of your next PEX piping system installation is easy with Apollo PEX fittings