ApolloPEX Lead-Free dezincification-resistant brass couplings are the premier low cost solution for connections within a PEX piping system. ApolloPEX fittings are suitable for both potable water and hydronic heating systems. ApolloPEX fittings may be used with copper crimp rings, stainless steel pinch clamps or stainless steel crimp sleeve (all sold separately). Available in a variety of configurations and sizes, completion of your next PEX piping system installation is easy with ApolloPEX fittings. Lead-free DZR brass. Barb connection. For use with PEX pipe. Maximum service temperature 200F and maximum pressure of 200 psi. Compatible with crimp ring or clamp connections. Third party certified to NSF-pw Annex G Complies with ASTM F877. Complies with ASTM F1807. CSA B137.5.