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Earlier editions: 20222019

Chapter 1 — GENERAL CODE PROVISIONS

601.8 Horse Meat and Pet Food

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.

Establishments . . . . . . . . . . . . . . .139

602.0 Unlawful Connections . . . . . . . . . .139

602.1 Prohibited Installation . . . . . . . . . .139

602.2 Cross-Contamination . . . . . . . . . .139

602.3 Backflow Prevention . . . . . . . . . . .139

xxxii 2025 CALIFORNIA PLUMBING CODE

TABLE OF CONTENTS

602.4 Approval by Authority . . . . . . . . . .139

603.0 Cross-Connection Control . . . . . .139

603.1 General . . . . . . . . . . . . . . . . . . . . .139

603.2 Approval of Devices or Assemblies . . . . . . . . . . . . . . . . . .139

603.3 Backflow Prevention Devices, Assemblies, and Methods . . . . . .140

603.4 General Requirements . . . . . . . . .140

603.5 Specific Requirements . . . . . . . . .141

Table 603.2 Backflow Prevention Devices, Assemblies, and Methods . . . . . .142

Table 603.3.1 Minimum Air Gaps for Water Distribution . . . . . . . . . . . . . . . . . .144

604.0 Materials . . . . . . . . . . . . . . . . . . . .146

604.1 Pipe, Tube, and Fittings . . . . . . . .146

604.2 Lead Content . . . . . . . . . . . . . . . .147

604.3 Copper or Copper Alloy Tube . . .147

604.4 Hard-Drawn Copper or Copper Alloy Tubing . . . . . . . . . . . . . . . . .147

604.5 Flexible Connectors . . . . . . . . . . .147

604.6 Cast-Iron Fittings . . . . . . . . . . . . .147

604.7 Malleable Iron Fittings . . . . . . . . .147

604.8 Previously Used Piping and Tubing . . . . . . . . . . . . . . . . . . . . . .147

604.9 Epoxy Coating . . . . . . . . . . . . . . .147

604.10 Plastic Materials . . . . . . . . . . . . . .147

Table 604.1 Materials for Building Supply and Water Distribution Piping and Fittings . . . . . . . . . . . . . . . . . .148

604.11 Solder . . . . . . . . . . . . . . . . . . . . . .149

604.12 Flexible Corrugated Connectors . .149

604.13 Water Heater Connectors . . . . . . .149

605.0 Joints and Connections . . . . . . . .149

605.1 Copper or Copper Alloy Pipe, Tubing, and Joints . . . . . . . . . . . .149

605.2 CPVC Plastic Pipe and Joints . . .150

605.3 CPVC/AL/CPVC Plastic Pipe and Joints . . . . . . . . . . . . . . . . . . .150

605.4 Ductile Iron Pipe and Joints . . . . .150

605.5 Galvanized Steel Pipe and Joints . . . . . . . . . . . . . . . . . . . . . .151

605.6 PE Plastic Pipe/Tubing and Joints . . . . . . . . . . . . . . . . . . . . . .151

605.7 PE-AL-PE Plastic Pipe/Tubing and Joints . . . . . . . . . . . . . . . . . . .151

605.8 PE-RT . . . . . . . . . . . . . . . . . . . . . .151

605.9 PEX Plastic Tubing and Joints . . .151

605.10 PEX-AL-PEX Plastic Tubing and Joints . . . . . . . . . . . . . . . . . . .152

605.11 Polypropylene (PP) Piping and Joints . . . . . . . . . . . . . . . . . . .152

605.12 PVC Plastic Pipe and Joints . . . . .152

605.13 Stainless Steel Pipe and Joints . . .152

605.14 Slip Joints . . . . . . . . . . . . . . . . . . .153

605.15 Dielectric Unions . . . . . . . . . . . . . .153

605.16 Joints Between Various

Materials . . . . . . . . . . . . . . . . . . . .153

606.0 Valves . . . . . . . . . . . . . . . . . . . . . .153

606.1 General . . . . . . . . . . . . . . . . . . . . .153

606.2 Fullway Valve . . . . . . . . . . . . . . . .153

606.3 Multidwelling Units . . . . . . . . . . . .153

606.4 Multiple Openings . . . . . . . . . . . . .153

606.5 Control Valve . . . . . . . . . . . . . . . .153

606.6 Accessible . . . . . . . . . . . . . . . . . .153

606.7 Multiple Fixtures . . . . . . . . . . . . . .153

606.9 Check Valve Required . . . . . . . . .153

606.10 Leak Detection Devices . . . . . . . .154

607.0 Potable Water Supply Tanks . . . .154

607.1 General . . . . . . . . . . . . . . . . . . . . .154

607.2 Private Well Water Tanks . . . . . . .154

607.3 Potable Water Tanks . . . . . . . . . .154

607.4 Venting . . . . . . . . . . . . . . . . . . . . .154

607.5 Overflow . . . . . . . . . . . . . . . . . . . .154

607.6 Valves . . . . . . . . . . . . . . . . . . . . . .154

608.0 Water Pressure, Pressure Regulators, Pressure Relief Valves, and Vacuum Relief

Valves . . . . . . . . . . . . . . . . . . . . . .154

608.1 Inadequate Water Pressure . . . . .154

608.2 Excessive Water Pressure . . . . . .154

608.3 Expansion Tanks, and Combination Temperature and Pressure-Relief Valves . . . . .154

608.4 Pressure Relief Valves . . . . . . . . .154

608.5 Discharge Piping . . . . . . . . . . . . .154

608.6 Water-Heating Devices . . . . . . . . .155

608.7 Vacuum Relief Valves . . . . . . . . .155

609.0 Installation, Testing, Unions, and Location . . . . . . . . . . . . . . . . .155

609.1 Installation . . . . . . . . . . . . . . . . . .155

609.2 Trenches . . . . . . . . . . . . . . . . . . . .155

609.3 Under Concrete Slab . . . . . . . . . .155

609.4 Testing . . . . . . . . . . . . . . . . . . . . .155

609.5 Unions . . . . . . . . . . . . . . . . . . . . .155

609.6 Location . . . . . . . . . . . . . . . . . . . .155

609.7 Abutting Lot . . . . . . . . . . . . . . . . .155

609.8 Pumps . . . . . . . . . . . . . . . . . . . . .155

609.9 Low-Pressure Cutoff Required on Booster Pumps for Water Distribution Systems . . . . . . . . . . .156

TABLE OF CONTENTS

609.10 Disinfection of Potable Water System . . . . . . . . . . . . . . . . . . . . .156

609.11 Water Hammer . . . . . . . . . . . . . . .156

609.12 Pipe Insulation . . . . . . . . . . . . . . .156

610.0 Size of Potable Water Piping . . . .156

610.1 Size . . . . . . . . . . . . . . . . . . . . . . . .156

610.2 Pressure Loss . . . . . . . . . . . . . . . .156

610.3 Quantity of Water . . . . . . . . . . . . .157

610.4 Sizing Water Supply and Distribution Systems . . . . . . . . . . .157

610.5 Sizing per Appendices A, C, and M . . . . . . . . . . . . . . . . .157

610.6 Friction and Pressure Loss . . . . . .157

610.7 Conditions for Using Table 610.4 . . . . . . . . . . . . . . . . . .157

610.8 Size of Meter and Building Supply Pipe Using Table 610.4 . .157

610.9 Size of Branches . . . . . . . . . . . . .157

610.10 Sizing for Flushometer Valves . . .157

Table 610.10 Flushometer Fixture Units for Water Sizing Using Table 610.3 . . . . . . . . . . . . . . . . . .157

Table 610.3 Water Supply Fixture Units (WSFU) and Minimum Fixture Branch Pipe Sizes . . . . . . . . . . . .158

Table 610.4 Fixture Unit Table for

Determining Water Pipe and Meter Sizes . . . . . . . . . . . . . .159

610.11 Sizing Systems for Flushometer Tanks . . . . . . . . . . . .160

610.12 Sizing for Velocity . . . . . . . . . . . . .160

610.13 Exceptions . . . . . . . . . . . . . . . . . .160

611.0 Drinking Water Treatment Units . . . . . . . . . . . . . . . . . . . . . . .160

611.1 Application . . . . . . . . . . . . . . . . . .160

611.2 Air Gap Discharge . . . . . . . . . . . .160

611.3 Connection Tubing . . . . . . . . . . . .160

611.4 Sizing of Residential Softeners . . .160

612.0 Residential Fire Sprinkler Systems . . . . . . . . . . . . . . . . . . . .160

612.1 Installation . . . . . . . . . . . . . . . . . .160

Table 611.1 Drinking Water Treatment Units . . . . . . . . . . . . . . . . . . . . . . .161

Table 611.4 Sizing of Residential Water Softeners . . . . . . . . . . . . . . . . . . .161

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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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