Chapter 6 — WATER SUPPLY AND DISTRIBUTION
612.1 Installation — 2025 California Plumbing Code
California Plumbing Code (Title 24, Part 5) · 2025 edition · updated 2026-10-19 · 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 Plumbing Code (Title 24, Part 5) § 612.1 · Effective January 1, 2026 · Official source: Building Standards Commission
Residential Sprinkler Systems shall be installed in compliance with the California Residential Code or the California Fire Code.
| TABLE 611.1 DRINKING WATER TREATMENT UNITS | |||
|---|---|---|---|
| APPLICATION | RESIDENTIAL | RESIDENTIAL | COMMERCIAL |
| APPLICATION | POINT OF USE | POINT OF ENTRY | POINT OF ENTRY |
| Aesthetic Contaminant Reduction (filters) |
NSF/ANSI 42 | NSF/ANSI 42 | ASSE 1087 and NSF/ |
| Health Related Contaminant Reduction (filters) |
NSF/ANSI 53 | NSF/ANSI 53 | ASSE 1087 and NSF/ |
| Water Softener | – | NSF/ANSI 44 | ASSE 1087 |
| Ultraviolet Water Treatment | NSF/ANSI 55 | NSF/ANSI 55 | ASSE 1087 |
| Reverse Osmosis | NSF/ANSI 58 | NSF/ |
ASSE 1087 |
| Distillation | NSF/ANSI 62 | NSF/ANSI 62 | ASSE 1087 |
- Required for commercial modular systems only.
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