Chapter 6 — WATER SUPPLY AND DISTRIBUTION
611.3 Connection Tubing.
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.
The tubing to and from drinking water treatment units shall be of a size and material as recommended by the manufacturer.
| 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 42 | NSF 42 | ASSE 1087 and NSF 42* |
| Health Related Contaminant Reduction (filters) |
NSF 53 | NSF 53 | ASSE 1087 and NSF 53* |
| Water Softener | – | NSF 44 | ASSE 1087 |
| Ultraviolet Water Treatment | NSF 55 | NSF 55 | ASSE 1087 |
| Reverse Osmosis | NSF 58 | NSF 61 | ASSE 1087 |
| Distillation | NSF 62 | NSF 62 | ASSE 1087 |
* Required for commercial modular systems only.
160 2022 CALIFORNIA PLUMBING CODE
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