Chapter 6 — WATER SUPPLY AND DISTRIBUTION
605.9 PEX
California Plumbing Code (Title 24, Part 5) · 2022 edition · updated 2026-09-12 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Plastic Tubing and Joints. PEX plastic tubing and fitting joining methods shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 605.9.1 through Section 605.9.3.
All PEX pipe installed in California must provide at least 30-day UV protection. [OSHPD 1, 1R, 2, 3, 4 & 5] Instal- lation and use of PEX tubing shall be in accordance with manufacturer’s standards. PEX piping shall not be used for any application that would result in noncompliance with any provisions of the California Building Standards Code.
605.9.1 Fittings. Fittings for PEX tubing shall comply with the applicable standards referenced in Table 604.1. PEX tubing that complies with ASTM F876 shall be marked with the applicable standard designation for the fittings, specified by the tubing manufacturer for use with the tubing. Brass fittings used with PEX tubing shall meet or exceed NSF 14-2009 standards to prevent dezincifica- tion and stress crack corrosion. [OSHPD 1, 1R, 2, 3, 4 & 5] Installation and use of PEX tubing shall be in accor- dance with manufacturer’s standards. PEX piping shall not be used for any application that would result in non- compliance with any provisions of the California Build- ing Standards Code. 605.9.2 Mechanical Joints. Mechanical joints shall be installed in accordance with the manufacturer’s installation instructions. 605.9.3 Push Fit Fittings. Removable and nonremovable push fit fittings that employ a quick assembly push fit connector shall comply with ASSE 1061.
2022 CALIFORNIA PLUMBING CODE 151
WATER SUPPLY AND DISTRIBUTION
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