Lead-free design is suitable for all lead-free potable water installations, in full compliance of all lead-free plumbing laws These fittings are intended for use in cold and hot water distribution (potable) systems Dezincification-resistant (DZR) forged brass construction resists corrosion from exposure to a wide variety of water conditions Barbed end connections are designed for insertion into PEX tubing that conforms to ASTM F876 and F877 Designed for use with copper crimp rings that are manufactured in compliance with ASTM F1807 and stainless steel clamp rings that are manufactured in compliance with ASTM F2098 .