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Chapter 1 — GENERAL CODE PROVISIONS

102.4 Additions, Alterations, Renovations, or

California Plumbing Code (Title 24, Part 5) · 2019 edition · updated 2026-09-10 · California

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

Repairs. Additions, alterations, renovations or repairs shall conform to that required for a new system without requiring the existing plumbing system to be in accordance with the requirements of this code. Additions, alterations, renovations, or repairs shall not cause an existing system to become unsafe, insanitary, or overloaded.

Additions, alterations, renovations, or repairs to existing plumbing installations shall comply with the provisions for new construction unless such deviations are found to be necessary and are first approved by the Authority Having Jurisdiction.

102.4.1 Building Sewers and Drains. Existing building sewers and building drains shall be permitted to be used in connection with new buildings or new plumbing and drainage work where they are found on examination and test to be in accordance with the requirements governing new work, and the proper Authority Having Jurisdiction shall notify the owner to make changes necessary to be in accordance with this code. No building, or part thereof, shall be erected or placed over a part of a drainage system that is constructed of materials other than those approved elsewhere in this code for use under or within a building. 102.4.2 Openings. Openings into a drainage or vent system, excepting those openings to which plumbing fixtures are properly connected or which constitute vent terminals, shall be permanently plugged or capped in an approved manner, using the appropriate materials in accordance with this code.

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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
    Overview
    1. 101.2 Scope. The provisions of this code shall apply to the
    2. 101.3 Purpose. This code is an ordinance providing minimum req…
    3. 101.4 Unconstitutional. Where a section, subsection, sentence,…
    4. 101.5 Validity. Where a provision of this code, or the applica…
    5. 102.2 Existing Installations. Plumbing systems lawfully
    6. 102.3 Maintenance. The plumbing and drainage system,
    7. 102.4 Additions, Alterations, Renovations, or
    8. 102.5 Health and Safety. Where compliance with the provisions …
    9. 102.6 Changes in Building Occupancy. Plumbing systems that are…
    10. 102.7 Moved Structures. Parts of the plumbing system of
    11. 102.8 Appendices. The provisions in the appendices are
    12. 103.0 Duties and Powers of the Authority Having
    13. 103.2 Liability. The Authority Having Jurisdiction charged
    14. 103.3 Applications and Permits. The Authority Having
    15. 104.2 Exempt Work. A permit shall not be required for the
    16. 103.4 Right of Entry. Where it is necessary to make an
    17. 104.3 Application for Permit. To obtain a permit, the
    18. 104.4 Permit Issuance. The application, construction documents…
    19. 105.2 Required Inspections. New plumbing work and
    20. 104.5 Fees. Fees shall be assessed in accordance with the
    21. 105.0 Inspections and Testing.105.1 General. Plumbing systems …
    22. 105.4 Connection to Service Utilities. No person shall
    23. 106.2 Notices of Correction or Violation. Notices of
    24. 106.3 Penalties. A person, firm, or corporation violating a
    25. 105.3 Testing of Systems. Plumbing systems shall be
    26. 106.4 Stop Orders. Where work is being done contrary to
    27. 106.5 Authority to Disconnect Utilities in Emergen-
    28. 106.6 Authority to Condemn. Where the Authority Having Jurisdi…
    29. 107.0 Board of Appeals.107.1 General. In order to hear and dec…
    30. 107.2 Limitations of Authority. The Board of Appeals
  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
  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 STANDARD FOR PEX TUBING SYSTEMS FOR …
  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

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