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Earlier editions: 20222019

Chapter 1 — GENERAL CODE PROVISIONS

616.0 Emergency Water Supply . . . . . . . .162

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 7 SANITARY DRAINAGE . . . . . . . .163

PART I Drainage Systems . . . . . . . . . . .165

701.0 General . . . . . . . . . . . . . . . . . . . . .165

701.1 Applicability . . . . . . . . . . . . . . . . . .165

701.2 Drainage Piping . . . . . . . . . . . . . .165

701.3 Drainage Fittings . . . . . . . . . . . . .165

701.4 Continuous Wastes . . . . . . . . . . .165

701.5 Lead . . . . . . . . . . . . . . . . . . . . . . .165

701.6 Caulking Ferrules . . . . . . . . . . . . .165

701.7 Soldering Bushings . . . . . . . . . . . .165

Table 701.6 Caulking Ferrules . . . . . . . . . . . . .165

Table 701.7 Soldering Bushings . . . . . . . . . . . .165

702.0 Fixture Unit Equivalents . . . . . . . .165

702.1 Trap Size . . . . . . . . . . . . . . . . . . .165

Table 701.2 Materials for Drain, Waste, Vent Pipe and Fittings . . . . . . . . .166

Table 702.1 Drainage Fixture Unit Values (DFU) . . . . . . . . . . . . . . . .167

Table 702.1(1) Maximum Drainage Fixture Units for a Trap and Trap Arm . . .168

702.2 Intermittent Flow . . . . . . . . . . . . . .168

Table 702.2 Discharge Capacity in Gallons Per Minute for

Intermittent Flow Only . . . . . . . . .168

702.3 Continuous Flow . . . . . . . . . . . . . .168

703.0 Size of Drainage Piping . . . . . . . .168

703.1 Minimum Size . . . . . . . . . . . . . . . .168

703.2 Maximum Number of Fixture

Units . . . . . . . . . . . . . . . . . . . . . . .168

703.3 Sizing per Appendix C . . . . . . . . .168

704.0 Fixture Connections (Drainage) . .168

704.1 Inlet Fittings . . . . . . . . . . . . . . . . .168

704.2 Single Vertical Drainage Pipe . . . .168

704.3 Commercial Sinks . . . . . . . . . . . . .168

Table 703.2 Maximum Unit Loading and Maximum Length of Drainage and Vent Piping . . . . . . . . . . . . . .169

705.0 Joints and Connections . . . . . . . .169

705.1 ABS and ABS Co-Extruded

Plastic Pipe and Joints . . . . . . . . .169

705.2 Cast-Iron Pipe and Joints . . . . . . .169

705.3 Copper or Copper Alloy Pipe (DWV) and Joints . . . . . . . . .170

705.4 Galvanized Steel Pipe and Joints . . . . . . . . . . . . . . . . . . .170

705.5 Polyethylene (PE) Sewer Pipe . . .170

xxxiv 2025 CALIFORNIA PLUMBING CODE

TABLE OF CONTENTS

705.6 PVC and PVC Co-Extruded

Plastic Pipe and Joining Methods . . . . . . . . . . . . . . . . . . . .171

705.7 Stainless Steel Pipe and Joints . . .171

705.8 Vitrified Clay Pipe and Joints . . . .171

705.9 Special Joints . . . . . . . . . . . . . . . .171

705.10 Joints Between

Various Materials . . . . . . . . . . . . .171

706.0 Changes in Direction of Drainage Flow . . . . . . . . . . . . . . .172

706.1 Approved Fittings . . . . . . . . . . . . .172

706.2 Horizontal to Vertical . . . . . . . . . .172

706.3 Horizontal to Horizontal . . . . . . . .172

706.4 Vertical to Horizontal . . . . . . . . . .172

707.0 Cleanouts . . . . . . . . . . . . . . . . . . .172

707.1 Plug . . . . . . . . . . . . . . . . . . . . . . .172

Table 707.1 Cleanouts . . . . . . . . . . . . . . . . . . .172

707.2 Approved . . . . . . . . . . . . . . . . . . .172

Table 707.2 Cleanout Materials for Drain, Waste, and Vent . . . . . . . . . . . . . .172

707.3 Watertight and Gastight . . . . . . . .172

707.4 Location . . . . . . . . . . . . . . . . . . . .172

707.5 Cleaning . . . . . . . . . . . . . . . . . . . .173

707.6 Extension . . . . . . . . . . . . . . . . . . .173

707.7 Interceptor . . . . . . . . . . . . . . . . . .173

707.8 Access . . . . . . . . . . . . . . . . . . . . .173

707.9 Clearance . . . . . . . . . . . . . . . . . . .173

707.10 Fittings . . . . . . . . . . . . . . . . . . . . .173

707.11 Pressure Drainage Systems . . . . .173

707.12 Countersunk Cleanout Plugs . . . .173

707.13 Hubless Blind Plugs . . . . . . . . . . .173

707.14 Trap Arms . . . . . . . . . . . . . . . . . . .173

708.0 Grade of Horizontal Drainage Piping . . . . . . . . . . . . . . . . . . . . . .173

708.1 General . . . . . . . . . . . . . . . . . . . . .173

709.0 Gravity Drainage Required . . . . . .173

709.1 General . . . . . . . . . . . . . . . . . . . . .173

710.0 Drainage of Fixtures Located Below the Next Upstream Manhole or Below the Main

Sewer Level . . . . . . . . . . . . . . . . .173

710.1 Backflow Protection . . . . . . . . . . .173

710.2 Sewage Discharge . . . . . . . . . . . .173

710.3 Sewage Ejector and Pumps . . . . .173

710.4 Discharge Line . . . . . . . . . . . . . . .174

710.5 Size of Building Drains and Sewers . . . . . . . . . . . . . . . . . . . . .174

710.6 Backwater Valves . . . . . . . . . . . . .174

710.7 Drainage and Venting Systems . . .174

710.8 Sump and Receiving Tank Construction . . . . . . . . . . . . . . . . .174

710.9 Alarm . . . . . . . . . . . . . . . . . . . . . .174

710.10 Sump and Receiving Tank Covers and Vents . . . . . . . . . . . . .174

710.11 Air Tanks . . . . . . . . . . . . . . . . . . .174

710.12 Grinder Pump Ejector . . . . . . . . . .174

710.13 Macerating Toilet Systems and Pumped Waste Systems . . . .174

711.0 Suds Relief . . . . . . . . . . . . . . . . . .175

711.1 General . . . . . . . . . . . . . . . . . . . . .175

712.0 Testing . . . . . . . . . . . . . . . . . . . . .175

712.1 Media . . . . . . . . . . . . . . . . . . . . . .175

712.2 Water Test . . . . . . . . . . . . . . . . . .175

712.3 Air Test . . . . . . . . . . . . . . . . . . . . .175

PART II Building Sewers . . . . . . . . . . . . .175

713.0 Sewer Required . . . . . . . . . . . . . .175

713.1 Where Required . . . . . . . . . . . . . .175

713.2 Private Sewage Disposal System . . . . . . . . . . . . . . . . . . . . .175

713.3 Public Sewer . . . . . . . . . . . . . . . . .175

713.4 Public Sewer Availability . . . . . . .175

713.5 Permit . . . . . . . . . . . . . . . . . . . . . .175

713.6 Lot . . . . . . . . . . . . . . . . . . . . . . . . .175

713.7 Installation . . . . . . . . . . . . . . . . . .175

714.0 Damage to Public Sewer or Private Sewage Disposal System . . . . . . . . . . . . . . . . . . . . .175

714.1 Unlawful Practices . . . . . . . . . . . .175

714.2 Prohibited Water Discharge . . . . .176

714.3 Prohibited Sewer Connection . . . .176

714.4 Commercial Food Waste

Disposer . . . . . . . . . . . . . . . . . . . .176

714.5 Tanks . . . . . . . . . . . . . . . . . . . . . .176

715.0 Building Sewer Materials . . . . . . .176

715.1 Materials . . . . . . . . . . . . . . . . . . . .176

715.2 Joining Methods and Materials . . .176

715.3 Existing Sewers . . . . . . . . . . . . . .176

716.0 Markings . . . . . . . . . . . . . . . . . . . .176

716.1 General . . . . . . . . . . . . . . . . . . . . .176

717.0 Size of Building Sewers . . . . . . . .176

717.1 General . . . . . . . . . . . . . . . . . . . . .176

Table 717.1 Maximum/Minimum Fixture

Unit Loading on Building Sewer Piping . . . . . . . . . . . . . . . .176

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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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