Peggy, What about 'PEX' ?
Peggy: 1. What about “PEX”? 2. If not, what do you recommend for potable water piping ? For those wondering what 'PEX' is: Cross-linked Polyethylene (PEX) is a thermoset material made from medium or high density, cross-linkable polyethylene meeting the requirements of ASTM F876 and F877, and ANSI/NSF Standard 61 (Potable Water). PEX piping has been used in hot and cold water distribution systems and for hydronic radiant heating in Europe for many years. Introduced into the United States in the 1980's, PEX has replaced polybutylene (PB) as the most widely-used flexible plumbing piping. There are currently three methods for producing PEX tubing, the Engle or Peroxide method, the E-beam or radiation method and the Silane method. All three processes produce tubing cross-linked to varying degrees that result in a product acceptable for potable water distribution applications. All PEX that has been tested and certified for potable applications carries the mark(s) of nationally recognized third-party certification agencies such as NSF, IAPMO, ICBO-ES, Warnock Hersey or UL. There are numerous 'proprietry' PEX products, each making claims as to their suitability & superiority. There are several methods of connecting PEX, all of which involve mechanical fittings. There are two approved standard specifications for PEX connections: ASTM F 1807 and ASTM F 1960. Both reference mechanical insert fittings. The crimp fittings specified in ASTM F1807 are the most widely used. Other fitting systems, including insert and outside diameter compression fittings, are also available. PEX cannot be joined by solvent cement or heat fusion methods. Thanks and Regards,
