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Chapter 14 — FIRESTOP PROTECTION

1405.2 Fire-Resistance Rating.

California Plumbing Code (Title 24, Part 5) · 2022 edition · updated 2026-09-10 · California

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

Where penetrating a fireresistance-rated wall, partition, floor, floor-ceiling assembly, roof-ceiling assembly, or shaft enclosure, the fire-resistance rating of the assembly shall be restored to its original rating. Exceptions: (1) Concrete, mortar, or grout shall be permitted to be used

to fill the annular spaces around cast-iron, copper, copper alloy, or steel piping that penetrates concrete or masonry fire-resistant-rated assemblies. The nominal diameter of the penetrating item shall not exceed 6 inches (150 mm), and the opening size shall not exceed 144 square inches (0.093 m 2 ).

The thickness of concrete, mortar, or grout shall be the full thickness of the assembly or the thickness necessary to provide a fire-resistance rating not less than the required fire-resistance rating of the assembly penetrated. (2) The material used to fill the annular space shall prevent

the passage of flame and hot gases capable of igniting cotton waste for the time period equivalent to the fireresistance rating of the assembly, where tested to standard(s) referenced in Section 1405.3.

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▸Contents — California Plumbing Code (Title 24, Part 5)
California Plumbing Code (Title 24, Part 5)
  1. Chapter 1 — GENERAL CODE PROVISIONS
  2. Chapter 2 — DEFINITIONS
  3. Chapter 3 — GENERAL REGULATIONS
  4. Chapter 4 — PLUMBING FIXTURES AND FIXTURE FITTINGS
  5. Chapter 5 — WATER HEATERS
  6. Chapter 6 — WATER SUPPLY AND DISTRIBUTION
  7. Chapter 7 — SANITARY DRAINAGE
  8. Chapter 8 — INDIRECT WASTES
  9. Chapter 9 — VENTS
  10. Chapter 10 — TRAPS AND INTERCEPTORS
  11. Chapter 11 — STORM DRAINAGE
  12. Chapter 12 — FUEL GAS PIPING
  13. Chapter 13 — HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICA…
  14. ▸Chapter 14 — FIRESTOP PROTECTION
    Overview
    1. 1401.1 Applicability. Piping penetrations of required fireresi…
    2. 1402.1 Penetrations. Construction documents shall indicate wit…
    3. 1403.1 Materials. Firestop systems shall be installed in
    4. 1404.1 General Requirements. Combustible piping
    5. 1404.2 Fire-Resistance Rating. Where penetrating a fireresista…
    6. 1404.3 Firestop Systems. Penetrations shall be protected
    7. 1404.4 Connections. Where piping penetrates a rated
    8. 1404.5 Insulation and Coverings. Insulation and coverings on o…
    9. 1404.6 Sleeves. Where sleeves are used, the sleeves shall
    10. 1405.1 General Requirements. Noncombustible piping
    11. 1405.2 Fire-Resistance Rating. Where penetrating a fireresista…
    12. 1405.3 Firestop Systems. Penetrations shall be protected
    13. 1405.4 Connections. Where piping penetrates a rated
    14. 1405.5 Unshielded Couplings. Unshielded couplings
    15. 1405.6 Sleeves. Where sleeves are used, the sleeves shall
    16. 1405.7 Insulation and Coverings. Insulation and coverings on o…
    17. 1406.1 General. Prior to being concealed, piping penetrations …
    18. 1406.2 Examination. The Authority Having Jurisdiction
    19. 1406.3 Penetrations. The Authority Having Jurisdiction
    20. 1406.4 Field Installations. The Authority Having Jurisdiction …
  15. Chapter 15 — ALTERNATE WATER SOURCES FOR NONPOTABLE APPLICATIONS
  16. Chapter 16 — NONPOTABLE RAINWATER CATCHMENT SYSTEMS
  17. Chapter 17 — REFERENCED STANDARDS
  18. Appendix A — RECOMMENDED RULES FOR SIZING THE WATER SUPPLY SYS…
  19. Appendix B — EXPLANATORY NOTES ON COMBINATION WASTE AND VENT S…
  20. Appendix C — ALTERNATE PLUMBING SYSTEMS
  21. Appendix D — SIZING STORM WATER DRAINAGE SYSTEMS
  22. Appendix E — MANUFACTURED/MOBILE HOME PARKS AND RECREATIONAL V…
  23. Appendix F — FIREFIGHTER BREATHING AIR REPLENISHMENT SYSTEMS
  24. Appendix G — SIZING OF VENTING SYSTEMS
  25. Appendix H — PRIVATE SEWAGE DISPOSAL SYSTEMS
  26. Appendix I — INSTALLATION STANDARDS
  27. Appendix J — COMBINATION OF INDOOR AND OUTDOOR COMBUSTION AND …
  28. Appendix K — POTABLE RAINWATER CATCHMENT SYSTEMS
  29. Appendix L — SUSTAINABLE PRACTICES
  30. Appendix M — PEAK WATER DEMAND CALCULATOR
  31. Appendix N — IMPACT OF WATER TEMPERATURE ON THE POTENTIAL FOR …

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