Chapter 16 — NONPOTABLE RAINWATER CATCHMENT SYSTEMS
1601.5 Maintenance and Inspection — 2025 California Plumbing Code
California Plumbing Code (Title 24, Part 5) · 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 Plumbing Code (Title 24, Part 5) § 1601.5 · Effective January 1, 2026 · Official source: Building Standards Commission
Rainwater catchment systems and components shall be inspected and maintained in accordance with with the manufacturer’s recommendations and/or as required by the enforcing agency .
TABLE 1601.5 MINIMUM ALTERNATE WATER SOURCE TESTING, INSPECTION, AND MAINTENANCE FREQUENCY
| DESCRIPTION | MINIMUM FREQUENCY |
|---|---|
Inspect and clean filters and screens, and replace (where necessary). |
Every 3 months |
Inspect and verify that disinfection, filters, and water quality treatment devices and systems are operational and maintaining minimum water quality requirements as determined by the Authority Having Jurisdiction. |
In accordance with manufac- turer’s instructions and the Authority Having Jurisdiction. |
Inspect and clear debris from rainwater gutters, downspouts, and roof washers. |
Every 6 months |
Inspect and clear debris from the roof or another above- ground rainwater collection surfaces. |
Every 6 months |
Remove tree branches and vegetation overhanging a roof or other aboveground rainwater collection surfaces. |
As needed |
Inspect pumps and verify operation. |
After initial installation and every 12 months thereafter |
Inspect valves and verify operation. |
After initial installation and every 12 months thereafter |
Inspect pressure tanks and verify operation. |
After initial installation and every 12 months thereafter |
Clear debris from and inspect storage tanks, locking devices, and verify operation. |
After initial installation and every 12 months thereafter |
Inspect caution labels and marking. |
After initial installation and every 12 months thereafter |
Cross-connection inspection and test.* |
After initial installation and every 12 months thereafter |
Test water quality of rainwater catchment systems required by Section 1603.4 to maintain a minimum water quality. |
Every 12 months. After system renovation or repair. |
- The cross-connection test shall be performed in the presence of the Authority Having Jurisdiction in accordance with the requirements of this chapter.
1601.5.1 Maintenance Responsibility. The required maintenance and inspection of rainwater catchment systems shall be the responsibility of the property owner unless otherwise required by the Authority Having Jurisdiction.
NONPOTABLE RAINWATER CATCHMENT SYSTEMS
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