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About This Item


Full Description

This Standard establishes the minimum physical and performance requirements for in-line valves used with cross-linked polyethylene (PEX) systems. Establishment of these criteria provide for the protection of public health and the environment.

This Standard applies to in line-valves for use in radiant heating systems, and hot and cold water cross linked polyethylene (PEX) distribution systems which are compliant with the requirements identified in ASTM F877 for PEX tubing systems. Valves meeting these requirements are rated for a minimum 100 psi (0.69 MPa) at 180° F (82° C). This Standard is supplemental to ASTM F877 and identifies additional requirements specific for valves. This Standard covers components intended for use in residential and commercial, hot and cold, potable water distribution systems; and sealed central heating, including underfloor heating systems. This Standard excludes supply stops and fixture fittings (faucets).

Document History

  1. NSF/ANSI 359-2018

    Valves for Crosslinked Polyethylene (PEX) Water Distribution Tubing Systems

    • Most Recent
  2. NSF 359-2016


    Valves for Crosslinked Polyethylene (PEX) Water Distribution Tubing Systems

    • Historical Version
  3. NSF 359-2011

    Valves for crosslinked polyethylene (PEX) water distribution tubing systems

    • Historical Version