1603.5 Rainwater Storage Tanks. Rainwater storage tanks

California Plumbing Code (Title 24, Part 5) · 2025 edition · updated 2026-09-10 · California

Italicized text is a California amendment to the model code, as printed in the official publication.

shall comply with IAPMO/ANSI Z1002 and be installed in accordance with Section 1603.6 through Section 1603.12.

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▸Contents — California Plumbing Code (Title 24, Part 5)

California Plumbing Code (Title 24, Part 5)

Chapter 1 — GENERAL CODE PROVISIONS
Chapter 2 — DEFINITIONS
Chapter 3 — GENERAL REGULATIONS
Chapter 4 — PLUMBING FIXTURES AND FIXTURE FITTINGS
Chapter 5 — WATER HEATERS
Chapter 6 — WATER SUPPLY AND DISTRIBUTION
Chapter 7 — SANITARY DRAINAGE
Chapter 8 — INDIRECT WASTES
Chapter 9 — VENTS
Chapter 10 — TRAPS AND INTERCEPTORS
Chapter 11 — STORM DRAINAGE
Chapter 12 — FUEL GAS PIPING
Chapter 13 — HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICA…
Chapter 14 — FIRESTOP PROTECTION
Chapter 15 — ALTERNATE WATER SOURCES FOR NONPOTABLE APPLICATIONS
▸Chapter 16 — NONPOTABLE RAINWATER CATCHMENT SYSTEMS
Overview
Chapter 17 — REFERENCED STANDARDS
Appendix A — RECOMMENDED RULES FOR SIZING THE WATER SUPPLY SYS…
Appendix B — EXPLANATORY NOTES ON COMBINATION WASTE AND VENT S…
Appendix C — ALTERNATE PLUMBING SYSTEMS
Appendix D — SIZING STORM WATER DRAINAGE SYSTEMS
Appendix E — MANUFACTURED/MOBILE HOME PARKS AND RECREATIONAL V…
Appendix F — FIREFIGHTER BREATHING AIR REPLENISHMENT SYSTEMS
Appendix G — SIZING OF VENTING SYSTEMS
Appendix H — PRIVATE SEWAGE DISPOSAL SYSTEMS
Appendix I — INSTALLATION STANDARDS
Appendix J — COMBINATION OF INDOOR AND OUTDOOR COMBUSTION AND …
Appendix K — POTABLE RAINWATER CATCHMENT SYSTEMS
Appendix L — SUSTAINABLE PRACTICES
Appendix M — PEAK WATER DEMAND CALCULATOR
Appendix N — IMPACT OF WATER TEMPERATURE ON THE POTENTIAL FOR …
Appendix O — NON-SEWERED SANITATION SYSTEMS
Appendix P — PROFESSIONAL QUALIFICATIONS
Appendix Q — INDOOR HORTICULTURAL FACILITIES
Appendix R — TINY HOUSES
Appendix S — ONSITE STORMWATER TREATMENT SYSTEMS

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