1210.1 Piping, Tubing, and Fittings — 2025 California Mechanical Code
California Mechanical Code (Title 24, Part 4) · 2025 edition · updated 2026-09-25 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Cite as: 2025 California Mechanical Code (Title 24, Part 4) § 1210.1 · Effective January 1, 2026 · Official source: Building Standards Commission
Hydronic pipe and tubing shall comply with the applicable standards referenced in Table 1210.1 and shall be approved for use based on the intended purpose. Materials shall be rated for the operating
260 2025 CALIFORNIA MECHANICAL CODE
HYDRONICS
TABLE 1210.1
MATERIALS FOR HYDRONIC SYSTEM PIPING, TUBING, AND FITTINGS
| MATERIAL | STANDARDS | |
|---|---|---|
| MATERIAL | PIPING/TUBING | FITTINGS |
| Copper/ |
ASTM B42, ASTM B43, ASTM B75, ASTM B88, ASTM B135, ASTM B2512, ASTM B302, ASTM B447 |
ASME B16.15, ASME B16.18, ASME B16.22, ASME B16.23, ASME B16.24, ASME B16.26, ASME B16.29, ASME B16.51, ASSE 1061, ASTM F3226, IAPMO PS 117 |
| Ductile Iron | AWWA C115/A21.15, AWWA C151/A21.51 |
AWWA C110/A21.101, AWWA C153/A21.53 |
| Steel | ASTM A53, ASTM A106, ASTM A254 | ASME B16.5, ASME B16.9, ASME B16.11, ASTM A420, ASTM F3226, IAPMO IGC 353, IAPMO PS 117 |
| Stainless Steel | ASTM A269, ASTM A312, ASTM A554, ASTM A778 |
ASTM F1476, ASTM F1548, ASTM F3226, IAPMO IGC 353, IAPMO PS 117 |
| Gray Iron | –– | ASTM A126 |
| Malleable Iron | –– | ASME B16.3 |
| Chlorinated Polyvinyl Chloride (CPVC) | ASTM D2846, ASTM F441, ASTM F442, CSA B137.6 |
ASSE 1061, ASTM D2846, ASTM F437, ASTM F438, ASTM F439, ASTM F1970, CSA B137.6 |
| Polyethylene (PE) | ASTM D1693, ASTM D2513, ASTM D2683, ASTM D2737, ASTM D3035, ASTM D3350, ASTM F714, ASTM F2165, AWWA C901, CSA B137.1, NSF/ |
ASTM D2609, ASTM D2683, ASTM D3261, ASTM F1055, ASTM F2165, CSA B137.1, NSF/ |
| Cross-Linked Polyethylene (PEX) | ASTM F876, ASTM F2165, ASTM F3253, CSA B137.5, NSF/ |
ASSE 1061, ASTM F877, ASTM F1055, ASTM F1807, ASTM F1960, ASTM F2080, ASTM F2098, ASTM F2159, ASTM F2165, ASTM F2735, ASTM F3253, ASTM F3347, ASTM F3348, CSA B137.5, NSF/ |
| Polypropylene (PP) | ASTM F2165, ASTM F2389, CSA B137.11, NSF/ |
ASTM F2165, ASTM F2389, CSA B137.11, NSF/ |
| Polyvinyl Chloride (PVC) | ASTM D1785, ASTM D2241, CSA B137.3 |
ASTM D2464, ASTM D2466, ASTM D2467, ASTM F1970, CSA B137.2, CSA B137.3 |
| Polyethylene of Raised Temperature (PE-RT) |
ASTM F2165, ASTM F2623, ASTM F2769, CSA B137.18 |
ASSE 1061, ASTM F1807, ASTM F2159, ASTM F2165, ASTM F2735, ASTM F2769, ASTM D3261, ASTM F3347, ASTM F3348, ASTM F1055, CSA B137.18 |
| Cross-Linked Polyethylene/ Aluminum/ (PEX-AL-PEX) |
ASTM F1281, ASTM F2165, CSA B137.10 |
ASTM F1281, ASTM F1974, ASTM F2165, ASTM F2434, CSA B137.10 |
| Polyethylene/ (PE-AL-PE) |
ASTM F1282, ASTM F2165, CSA B137.9 |
ASTM F1282, ASTM F1974, ASTM F2165, CSA B137.9 |
| Chlorinated Polyvinyl Chloride/ minum/ Chlorinated Polyvinyl Chloride (CPVC/ |
ASTM F2855 | ASTM D2846 |
Notes: 1 Ductile and gray iron. 2 Only type K, L, or M tubing allowed to be installed.
HYDRONICS
the pressure rating of the pipe provided that the molded fittings shall be fabricated so that the wall thickness of the material is maintained at the threads. Thread sealant compound that is compatible with the pipe and fitting, insoluble in water, and nontoxic shall be applied to male threads. Caution shall be used during assembly to prevent over tightening of the CPVC components once the thread sealant has been applied. Female CPVC threaded fittings shall be used with plastic male threads only.
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