408 Plumbing — 2025 California Existing Building Code
California Existing Building Code (Title 24, Part 10) · 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 Existing Building Code (Title 24, Part 10) § 408 · Effective January 1, 2026 · Official source: Building Standards Commission
408.1 Materials.¶
Plumbing materials and supplies shall not be used for repairs that are prohibited in the California Plumbing Code .
[HCD 1, HCD 2, BSC & BSC-CG] Existing plumbing systems undergoing repair shall comply with the California Plumbing Code and Divi- sion 4.3 or Division 5.3 of the CALGreen Code, as applicable.
408.2 Water closet replacement.¶
The maximum water consumption flow rates and quantities for all replaced water closets shall be 1.28 gallons (4.8 L ) per flushing cycle.
408.3 Health care facilities.¶
Portions of medical gas systems being repaired in Group I-2, ambulatory care facilities and outpatient clinics shall comply with NFPA 99 requirements for repairs.
4-4 2025 CALIFORNIA EXISTING BUILDING CODE
CALIFORNIA EXISTING BUILDING CODE – MATRIX ADOPTION TABLE
CHAPTER 4A – REPAIRS [OSHPD 1]
(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
| Adopting Agency | BSC | BSC- CG |
SFM | HCD | DSA | OSHPD | BSCC | DPH | AGR | DWR | CEC | CA | SL | SLC | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Adopting Agency | BSC | BSC- CG |
SFM | 1 | 2 | 1/AC | AC | SS | SS/CC | 1 | 1R | 2 | 3 | 4 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Adopt Entire Chapter | X | |||||||||||||||||||||||
| Adopt Entire Chapter as amended (amended sections listed below) |
||||||||||||||||||||||||
| Adopt only those sections that are listed below |
||||||||||||||||||||||||
| Chapter / Section |
The state agency does not adopt sections identified with the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.
4A-2 2025 CALIFORNIA EXISTING BUILDING CODE
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