NSF/ANSI 359-2024 ✓ Most Recent

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

This standard applies to in-line valves for use with cross-linked PEX tubing in hot and cold water distribution systems, radiant heating, and other applications identified in ASTM F877. 3 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 excludes supply stops and fixture fittings (faucets).