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Earlier editions: 20222019

Chapter 8 — INDIRECT WASTES

811.1 Pretreatment. Chemical or liquid industrial wastes

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.

that are likely to damage or increase maintenance costs on the sanitary sewer system, detrimentally affect sewage treatment or contaminate surface or subsurface waters shall be pretreated to render them innocuous before discharge into a drainage system. Detailed construction documents of the pretreatment facilities shall be required by the Authority Having Jurisdiction.

Piping conveying industrial, chemical, or process wastes from their point of origin to sewer-connected pretreatment facilities shall be of such material and design as to adequately perform its intended function to the satisfaction of the Authority Having Jurisdiction. Drainage discharge piping from pre

treatment facilities or interceptors shall be in accordance with standard drainage installation procedures.

Copper or copper alloy tube shall not be used for chemical or industrial wastes as defined in this section.

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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
    Overview
    1. 801.1 Applicability. This chapter shall govern the materials,
    2. 801.2 Air Gap or Air Break Required. Indirect waste piping sha…
    3. 801.3 Food and Beverage Handling Establishments.
    4. 801.4 Bar and Fountain Sink Traps. Where the sink in a
    5. 801.5 Connections from Water Distribution System.
    6. 801.6 Sterilizers. Lines, devices, or apparatus such as stills,
    7. 801.7 Drip or Drainage Outlets. Appliances, devices, or
    8. 802.1 General. No plumbing fixtures served by indirect
    9. 803.1 Materials. Pipe, tube, and fittings conveying indirect
    10. 803.2 Copper and Copper Alloys. Joints and connections in copp…
    11. 803.3 Pipe Size and Length. Except as hereinafter provided, th…
    12. 804.1 Standpipe Receptors. Plumbing fixtures or other
    13. 805.1 General. Indirect waste connections shall be provided
    14. 806.1 General. Appliances, devices, or apparatus such as
    15. 807.1 Non-Classed Apparatus. Commercial dishwashing
    16. 807.2 Undiluted Condensate Waste. Where undiluted
    17. 807.3 Domestic Dishwashing Machine. No domestic
    18. 808.1 General. Where permitted by the Authority Having
    19. 809.1 General. Drinking fountains shall be permitted to be
    20. 810.1 High-Temperature Discharge. No steam pipe shall
    21. 810.2 Sumps, Condensers, and Intercepting Tanks.
    22. 810.3 Cleaning. Sumps and condensers shall be provided
    23. 810.4 Strainers. An indirect waste interceptor is receiving
    24. 811.1 Pretreatment. Chemical or liquid industrial wastes
    25. 811.2 Waste and Vent Pipes. Each waste pipe receiving or
    26. 811.3 Joining Materials. Joining materials shall be of
    27. 811.4 Access. Where practicable, the piping shall be readily a…
    28. 811.5 Permanent Record. The owner shall make and keep
    29. 811.6 Chemical Vent. No chemical vent shall intersect
    30. 811.7 Discharge. Chemical wastes shall be discharged in a
    31. 811.8 Diluted Chemicals. The provisions of this section
    32. 812.1 General. Water lifts, expansion tanks, cooling jackets, …
    33. 813.1 General. Pipes carrying wastewater from swimming
    34. 814.1 Condensate Disposal. Condensate from air washers, air-co…
    35. 814.2 Condensate Control. Where any equipment or
    36. 814.3 Condensate Waste Pipe Material and Sizing.
    37. 814.4 Appliance Condensate Drains. Condensate drain
    38. 814.5 Point of Discharge. Air-conditioning condensate
    39. 814.6 Condensate Waste from Air-Conditioning
    40. 814.7 Plastic Fittings. Female plastic screwed fittings shall
  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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