C X C UNION - Wrot Copper on one end and Cast Bronze on the end - Lead Free Used in residential and commercial systems such as potable water, air conditioning and refrigeration. *Cleanned and bagged options for Medical Gas applications are avaliable , customers should call for pricing these options . Manufactured in an ISO 9001 certified facility, and backed by a 50-year limited warranty. Lead Free* Dezincification resistant ASTM B75 Alloy C12200 Third-party certified to NSF/ANSI 61 ASME B16.22 * Lead Free refers to the wetted surface of pipe, fittings and fixtures in potable water systems that have a weighted average lead content ≤ 0.25%. Source: California Health & Safety Code (116875); Vermont Act 193.