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Earlier editions: 20222019

Chapter 1 — GENERAL CODE PROVISIONS

727.0 Emergency Sanitary Drainage . . .178

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.

CHAPTER 8 INDIRECT WASTES . . . . . . . . . .179

801.0 General . . . . . . . . . . . . . . . . . . . . .181

801.1 Applicability . . . . . . . . . . . . . . . . . .181

801.2 Air Gap or Air Break Required . . .181

801.3 Food and Beverage Handling Establishments . . . . . . .181

801.4 Bar and Fountain Sink Traps . . . .181

801.5 Connections from Water Distribution System . . . . . . . . . . . .181

801.6 Sterilizers . . . . . . . . . . . . . . . . . . .181

801.7 Drip or Drainage Outlets . . . . . . . .181

802.0 Approvals . . . . . . . . . . . . . . . . . . .181

802.1 General . . . . . . . . . . . . . . . . . . . . .181

803.0 Indirect Waste Piping . . . . . . . . . .181

803.1 Materials . . . . . . . . . . . . . . . . . . . .181

803.2 Copper and Copper Alloys . . . . . .181

803.3 Pipe Size and Length . . . . . . . . . .181

804.0 Indirect Waste Receptors . . . . . . .182

804.1 Standpipe Receptors . . . . . . . . . .182

805.0 Pressure Drainage Connections . . . . . . . . . . . . . . . . .182

805.1 General . . . . . . . . . . . . . . . . . . . . .182

806.0 Sterile Equipment . . . . . . . . . . . . .182

806.1 General . . . . . . . . . . . . . . . . . . . . .182

807.0 Appliances . . . . . . . . . . . . . . . . . .182

807.1 Non-Classed Apparatus . . . . . . . .182

807.2 Undiluted Condensate Waste . . . .182

807.3 Domestic Dishwashing Machine . . . . . . . . . . . . . . . . . . . .182

808.0 Cooling Water . . . . . . . . . . . . . . . .182

808.1 General . . . . . . . . . . . . . . . . . . . . .182

809.0 Drinking Fountains . . . . . . . . . . . .182

809.1 General . . . . . . . . . . . . . . . . . . . . .182

810.0 Steam and Hot Water Drainage Condensers and Sumps . . . . . . . .182

810.1 High-Temperature Discharge . . . .182

Table 810.1 Pipe Connections in Blowoff Condensers and Sumps . . . . . . . .183

810.2 Sumps, Condensers, and Intercepting Tanks . . . . . . . . . . . .183

810.3 Cleaning . . . . . . . . . . . . . . . . . . . .183

810.4 Strainers . . . . . . . . . . . . . . . . . . . .183

811.0 Chemical Wastes . . . . . . . . . . . . .183

811.1 Pretreatment . . . . . . . . . . . . . . . . .183

811.2 Waste and Vent Pipes . . . . . . . . .183

811.3 Joining Materials . . . . . . . . . . . . . .183

811.4 Access . . . . . . . . . . . . . . . . . . . . .183

811.5 Permanent Record . . . . . . . . . . . .183

811.6 Chemical Vent . . . . . . . . . . . . . . .183

811.7 Discharge . . . . . . . . . . . . . . . . . . .183

811.8 Diluted Chemicals . . . . . . . . . . . . .183

812.0 Clear Water Wastes . . . . . . . . . . .183

812.1 General . . . . . . . . . . . . . . . . . . . . .183

813.0 Swimming Pools . . . . . . . . . . . . . .183

813.1 General . . . . . . . . . . . . . . . . . . . . .183

814.0 Condensate Waste and Control . . .183

814.1 Condensate Disposal . . . . . . . . . .183

814.2 Condensate Control . . . . . . . . . . .184

814.3 Condensate Waste Pipe Material and Sizing . . . . . . . . . . . .184

Table 814.3 Minimum Condensate Pipe Size . . . . . . . . . . . . . . . . . . .184

814.4 Appliance Condensate Drains . . .184

814.5 Point of Discharge . . . . . . . . . . . .184

814.6 Condensate Waste from

Air-Conditioning Coils . . . . . . . . . .185

814.7 Plastic Fittings . . . . . . . . . . . . . . .185

xxxvi 2025 CALIFORNIA PLUMBING CODE

TABLE OF CONTENTS

CHAPTER 9 VENTS . . . . . . . . . . . . . . . . . . . . .187

901.0 General . . . . . . . . . . . . . . . . . . . . .189

901.1 Applicability . . . . . . . . . . . . . . . . . .189

901.2 Vents Required . . . . . . . . . . . . . . .189

901.3 Trap Seal Protection . . . . . . . . . . .189

902.0 Vents Not Required . . . . . . . . . . .189

902.1 Interceptor . . . . . . . . . . . . . . . . . .189

902.2 Bars, Soda Fountains, and Counter . . . . . . . . . . . . . . . . . . . . .189

903.0 Materials . . . . . . . . . . . . . . . . . . . .189

903.1 Applicable Standards . . . . . . . . . .189

903.2 Use of Copper or Copper Alloy Tubing . . . . . . . . . . . . . . . . .189

903.3 Changes in Direction . . . . . . . . . .189

904.0 Size of Vents . . . . . . . . . . . . . . . .189

904.1 Size . . . . . . . . . . . . . . . . . . . . . . . .189

904.2 Length . . . . . . . . . . . . . . . . . . . . . .189

905.0 Vent Pipe Grades and Connections . . . . . . . . . . . . . . . . .190

905.1 Grade . . . . . . . . . . . . . . . . . . . . . .190

905.2 Horizontal Drainage Pipe . . . . . . .190

905.3 Vent Pipe Rise . . . . . . . . . . . . . . .190

905.4 Roof Termination . . . . . . . . . . . . .190

905.5 Location of Opening . . . . . . . . . . .190

905.6 Common Vertical Pipe . . . . . . . . .190

906.0 Vent Termination . . . . . . . . . . . . .190

906.1 Roof Termination . . . . . . . . . . . . .190

906.2 Clearance . . . . . . . . . . . . . . . . . . .190

906.3 Use of Roof . . . . . . . . . . . . . . . . .190

906.4 Outdoor Installations . . . . . . . . . . .190

906.5 Joints . . . . . . . . . . . . . . . . . . . . . .190

906.6 Lead . . . . . . . . . . . . . . . . . . . . . . .190

906.7 Frost or Snow Closure . . . . . . . . .190

907.0 Vent Stacks and Relief Vents . . . .190

907.1 Drainage Stack . . . . . . . . . . . . . . .190

907.2 Yoke Vent . . . . . . . . . . . . . . . . . . .190

908.0 Wet Venting . . . . . . . . . . . . . . . . .190

908.1 Vertical Wet Venting . . . . . . . . . . .190

908.2 Horizontal Wet Venting for a Bathroom Group . . . . . . . . . . . . . .191

909.0 Special Venting for Island Fixtures . . . . . . . . . . . . . . . . . . . . .191

909.1 General . . . . . . . . . . . . . . . . . . . . .191

910.0 Combination Waste and Vent

Systems . . . . . . . . . . . . . . . . . . . .191

910.1 Where Permitted . . . . . . . . . . . . . .191

910.2 Approval . . . . . . . . . . . . . . . . . . . .191

910.3 Vents . . . . . . . . . . . . . . . . . . . . . .191

910.4 Connections and Size . . . . . . . . .191

910.5 Vertical Waste Pipe . . . . . . . . . . .191

910.6 Cleanouts . . . . . . . . . . . . . . . . . . .191

910.7 Fixtures . . . . . . . . . . . . . . . . . . . . .191

911.0 Circuit Venting . . . . . . . . . . . . . . .191

911.1 Circuit Vent Permitted . . . . . . . . .191

911.2 Circuit Vent Size and

Connection . . . . . . . . . . . . . . . . . .192

911.3 Relief Vent . . . . . . . . . . . . . . . . . .192

911.4 Slope and Size of Horizontal Branch . . . . . . . . . . . . . . . . . . . . .192

911.5 Additional Fixtures . . . . . . . . . . . .192

912.0 Engineered Vent System . . . . . . .192

912.1 General . . . . . . . . . . . . . . . . . . . . .192

912.2 Minimum Requirements . . . . . . . .192

CHAPTER 10 TRAPS AND

INTERCEPTORS . . . . . . . . . . . . .193

1001.0 General . . . . . . . . . . . . . . . . . . . . .195

1001.1 Applicability . . . . . . . . . . . . . . . . . .195

1001.2 Where Required . . . . . . . . . . . . . .195

1002.0 Traps Protected by Vent Pipes . .195

1002.1 Vent Pipes . . . . . . . . . . . . . . . . . .195

1002.2 Fixture Traps . . . . . . . . . . . . . . . .195

1002.3 Change of Direction . . . . . . . . . . .195

1002.4 Vent Pipe Opening . . . . . . . . . . . .195

1003.0 Traps – Described . . . . . . . . . . . .195

1003.1 General Requirements . . . . . . . . .195

Table 1002.2 Horizontal Lengths of Trap Arms . . . . . . . . . . . . . . . . . . . . . . .195

1003.2 Slip Joint Fittings . . . . . . . . . . . . .195

1003.3 Size . . . . . . . . . . . . . . . . . . . . . . . .195

1004.0 Traps . . . . . . . . . . . . . . . . . . . . . .196

1004.1 Prohibited . . . . . . . . . . . . . . . . . . .196

1004.2 Movable Parts . . . . . . . . . . . . . . . .196

1005.0 Trap Seals . . . . . . . . . . . . . . . . . .196

1005.1 General . . . . . . . . . . . . . . . . . . . . .196

1006.0 Floor Drain Traps . . . . . . . . . . . . .196

1006.1 General . . . . . . . . . . . . . . . . . . . . .196

1007.0 Trap Seal Protection . . . . . . . . . . .196

1007.1 General . . . . . . . . . . . . . . . . . . . . .196

1007.2 Trap Seal Primers . . . . . . . . . . . .196

1008.0 Building Traps . . . . . . . . . . . . . . . .196

1008.1 General . . . . . . . . . . . . . . . . . . . . .196

1009.0 Interceptors (Clarifiers) and Separators . . . . . . . . . . . . . . . . . .196

1009.1 Where Required . . . . . . . . . . . . . .196

Table 1009.1 Approved Interceptors (Clarifiers) . .196

1009.2 Approval . . . . . . . . . . . . . . . . . . . .196

1009.3 Design . . . . . . . . . . . . . . . . . . . . .196

TABLE OF CONTENTS

1009.4 Relief Vent . . . . . . . . . . . . . . . . . .196

1009.5 Location . . . . . . . . . . . . . . . . . . . .196

1009.6 Maintenance of Interceptors . . . . .196

1009.7 Discharge . . . . . . . . . . . . . . . . . . .196

1010.0 Slaughterhouses, Packing Establishments, etc . . . . . . . . . . .196

1010.1 General . . . . . . . . . . . . . . . . . . . . .196

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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. 301.7 One- and Two-Family Dwellings . .50
    2. 301.8 OSHPD 1R . . . . . . . . . . . . . . . . . . .50
    3. 310.14 Services/Systems and Utilities . . . .52
    4. 310.15 Telephone and Data
    5. 401.3 Water-Conserving Fixtures
    6. 422.8 Cosmetology . . . . . . . . . . . . . . . . .69
    7. 422.9 Cosmetology Establishments . . . . .69
    8. 422.10 Commissaries Serving Mobile
    9. 422.11 Employee Lavatories in
    10. 501.2 California Energy Code
    11. 601.4 Schools of Cosmetology and
    12. 601.5 Meat and Poultry Processing
    13. 601.6 Collection Centers and
    14. 601.7 Renderers . . . . . . . . . . . . . . . . . . .139
    15. 601.8 Horse Meat and Pet Food
    16. 615.1 Uses Not Permitted . . . . . . . . . . . . .162
    17. 616.0 Emergency Water Supply . . . . . . . .162
    18. 717.2 Meat and Poultry Processing
    19. 727.0 Emergency Sanitary Drainage . . .178
    20. 1010.2 Meat and Poultry Processing
    21. 1010.3 Collection Centers and
    22. 1010.4 Horse Meat and Pet Food
    23. 1010.5 Draining and Plumbing . . . . . . . .197
    24. 1211.8 Earthquake-Actuated Gas
    25. 1501.9 Signage . . . . . . . . . . . . . . . . . . . .310
    26. 1504.5 Irrigation, Disposal Field and
    27. 1504.6 Reserved . . . . . . . . . . . . . . . . . . .318
    28. 1504.7 Reserved . . . . . . . . . . . . . . . . . . .318
    29. 1505.15 Minimum Water Quality
    30. 1505.16 Maintenance and Inspection . . . .322
    31. 101.1 Title. This document shall be known as the “Uniform
    32. 101.2 Scope. The provisions of this code shall apply to the
    33. 101.3 Purpose. This code is an ordinance providing minimum req…
    34. 101.4 Unconstitutional. Where a section, subsection, sentence,…
    35. 101.5 Validity. Where a provision of this code, or the applica…
    36. 102.1 Conflicts Between Codes. Where the requirements
    37. 102.2 Existing Installations. Plumbing systems lawfully
    38. 102.3 Maintenance. The plumbing and drainage system,
    39. 102.4 Additions, Alterations, Renovations, or Repairs.
    40. 102.5 Health and Safety. Where compliance with the provisions …
    41. 102.6 Changes in Building Occupancy. Plumbing systems that are…
    42. 102.7 Moved Structures. Parts of the plumbing system of
    43. 102.8 Appendices. The provisions in the appendices are
    44. 103.1 General. The Authority Having Jurisdiction shall be
    45. 103.2 Liability. The Authority Having Jurisdiction charged
    46. 103.3 Applications and Permits. The Authority Having
    47. 103.4 Right of Entry. Where it is necessary to make an
    48. 104.1 Permits Required. It shall be unlawful for a person,
    49. 104.2 Exempt Work. A permit shall not be required for the
    50. 104.3 Application for Permit. To obtain a permit, the
    51. 104.4 Permit Issuance. The application, construction documents…
    52. 104.5 Fees. Fees shall be assessed in accordance with the
    53. 105.1 General. Plumbing systems for which a permit is
    54. 105.2 Required Inspections. New plumbing work and
    55. 105.3 Testing of Systems. Plumbing systems shall be
    56. 105.4 Connection to Service Utilities. No person shall
    57. 106.1 General. It shall be unlawful for a person, firm, or
    58. 106.2 Notices of Correction or Violation. Notices of
    59. 106.3 Penalties. A person, firm, or corporation violating a
    60. 106.4 Stop Orders. Where work is being done contrary to
    61. 106.5 Authority to Disconnect Utilities in Emergen-
    62. 106.6 Authority to Condemn. Where the Authority Having Jurisdi…
    63. 107.1 General. In order to hear and decide appeals of orders,
    64. 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 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 …
  32. Appendix O — NON-SEWERED SANITATION SYSTEMS
  33. Appendix P — PROFESSIONAL QUALIFICATIONS
  34. Appendix Q — INDOOR HORTICULTURAL FACILITIES
  35. Appendix R — TINY HOUSES
  36. Appendix S — ONSITE STORMWATER TREATMENT SYSTEMS

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