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Earlier editions: 20222019

Chapter 4 — PLUMBING FIXTURES AND FIXTURE FITTINGS

422.4 Toilet Facilities Serving Employees and Cus-

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.

tomers. [Not adopted for OSHPD 1, 2, 3, 4 & 5] Each building or structure shall be provided with toilet facilities for employees and customers. Requirements for customers and employees shall be permitted to be met with a single set of restrooms accessible to both groups. Required toilet facilities for employees and customers located in shopping malls or centers shall be permitted to be met by providing a centrally located toilet facility accessible to several stores. The maximum travel distance from entry to any store to the toilet facility shall not exceed 300 feet (91 440 mm). Required toilet facilities for employees and customers in other than shopping malls or centers shall have a maximum travel distance not to exceed 500 feet (152 m).

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pancy classification shall be determined in accordance with the California Building Code . Occupancy classification not shown in Table 422.1 shall be considered separately by the Authority Having Jurisdiction.

[OSHPD 1, 2, 3, 4 & 5] Plumbing fixtures shall be provided in the minimum number shown in Table 4-2.

Exception: [BSC & DSA-SS] Using occupancy classifica- tion, described as function of space, determine occupant load factor from Table 4-1 Occupant Load Factor, of this chapter.

422.1.1 Fixture Calculations. The minimum number of fixtures shall be calculated at 50 percent male and 50 percent female based on the total occupant load. Where information submitted indicates a difference in the distribution

of the sexes such information shall be used to determine the number of fixtures for each sex. Once the occupancy load and occupancy are determined, Table 422.1 shall be applied to determine the minimum number of plumbing fixtures required. Where applying the fixture ratios in Table 422.1 results in fractional numbers, such numbers shall be rounded to the next whole number. For multiple occupancies, fractional numbers shall be first summed and then rounded to the next whole number. For toilet facilities designed for use by all genders, the minimum number of fixtures shall be the aggregate calculated at 50 percent female and 50 percent male in accordance with Table 422.1. Where all-gender fixtures are provided in addition to separate men’s and women’s facilities, those fixtures shall be included in determining the number of fixtures provided in an occupancy. [BSC & DSA-SS] The substitution of a water closet for each urinal shall be permitted provided the total number of fixtures installed complies with Table 422.1. 422.1.2 Single Use, Family or Assisted-Use Toilet, and Bathing Facilities. Where single use, family or assisted-use toilet, and bathing rooms are required, in applicable building regulations, the facilities shall be installed in accordance with those regulations. Fixtures located in single use, family or assisted-use, and bathing room facilities shall contribute to the total number of required fixtures in accordance with Section 422.1.

ilet,** and Bathing Facilities. Where single use, family or assisted-use toilet, and bathing rooms are required, in applicable building regulations, the facilities shall be installed in accordance with those regulations. Fixtures located in single use, family or assisted-use, and bathing room facilities shall contribute to the total number of required fixtures in accordance with Section 422.1.

422.1.3 [DSA-AC] Effective January 1, 1990, in new construction and those existing facilities which occu- pancy type are listed in Tables 422.1 and 4-4 for public use, which apply for permit to undertake construction, structural alterations, repairs or improvement which exceed 50 percent of the square footage of the entire facility, shall install water closets, urinals, lavatories and drinking fountains as stipulated in Tables 422.1 and 4-4 for public use. Community and/or municipal parks with a bleacher capacity not exceeding 500 seats shall be exempt from the requirements of this section and Tables 422.1 and 4-4. Each bathroom shall comply with Part 2, Chapter 11A and 11B of the California Building Code.

422.1.4 [OSHPD 1, 2, 3, 4 & 5] OSHPD facilities shall also comply with requirements of the California Building Code, Sections 1224, 1225, 1226, 1227 and 1228.

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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
    Overview
    1. 401.1 Applicability. This chapter shall govern the materials
    2. 401.2 Quality of Fixtures. Plumbing fixtures shall be construc…
    3. 401.3 Water-Conserving Fixtures and Fittings.
    4. 402.1 Cleaning. Plumbing fixtures shall be installed in a
    5. 402.2 Joints. Where a fixture comes in contact with the wall
    6. 402.3 Securing Fixtures. Floor-outlet or floor-mounted
    7. 402.4 Wall-Hung Fixtures. Wall-hung fixtures shall be
    8. 402.5 Setting. Fixtures shall be set level and in proper align…
    9. 402.6 Flanged Fixture Connections. Fixture connections between…
    10. 402.7 Supply Fittings. The supply lines and fittings for
    11. 402.8 Installation. Fixtures shall be installed in accordance
    12. 402.9 Design and Installation of Plumbing Fixtures.
    13. 402.10 Slip Joint Connections. Fixtures having concealed slip …
    14. 402.11 Future Fixtures. Where provisions are made for the
    15. 403.1 General. Where accessible facilities are required in
    16. 403.2 Fixtures and Fixture Fittings for Persons with
    17. 403.3 Exposed Pipes and Surfaces. Water supply and
    18. 404.1 Waste Fittings. Waste fittings shall comply with
    19. 404.2 Overflows. Where a fixture is provided with an overflow,…
    20. 405.1 Prohibited Water Closets. Water closets having an
    21. 405.2 Prohibited Urinals. Trough urinals and urinals with
    22. 405.3 Miscellaneous Fixtures. Fixed wooden, or tile wash
    23. 406.1 Water and Waste Connections. Baptisteries, ornamental an…
    24. 406.2 Special Use Sinks. Restaurant kitchen and other
    25. 406.3 Special Use Fixtures. Special use fixtures shall be
    26. 406.4 Zinc Alloy Components. Zinc alloy components
    27. 407.1 Application. Lavatories shall comply with ASME
    28. 407.2 Water Consumption. The maximum water flow rate
    29. 407.3 Limitation of Hot Water Temperature for Public
    30. 407.4 Transient Public Lavatories. Self-closing or metering fa…
    31. 407.5 Waste Outlet. Lavatories shall have a waste outlet
    32. 407.6 Overflow. Where overflows are provided, they shall
    33. 408.1 Application. Manufactured shower receptors and
    34. 408.2 Tileable Shower Receptors. Tileable shower receptors and…
    35. 408.3 Water Consumption. Showerheads shall have a «
    36. 408.6 Finished Curb or Threshold. Where a shower
    37. 408.7 Shower Compartments. Shower compartments
    38. 408.8 Lining for Showers and Receptors. Shower
    39. 408.4 Individual Shower and Tub-Shower Combina-
    40. 408.5 Waste Outlet. Showers shall have a waste outlet and
    41. 408.9 Public Shower Floors. Floors of public shower
    42. 408.10 Location of Valves and Heads. Control valves
    43. 408.11 Water Supply Riser. A water supply riser from the
    44. 409.1 Application. Bathtubs shall comply with ASME
    45. 409.2 Waste Outlet. Bathtubs and whirlpool bathtubs shall
    46. 409.3 Overflow. Where overflows are provided, they shall
    47. 409.4 Limitation of Hot Water Temperature in Bath-
    48. 411.3 Water Closet Seats. Water closet seats shall be properly…
    49. 411.4 Personal Hygiene Devices. Water closets with
    50. 412.1 Application. Urinals shall comply with ASME
    51. 409.5 Backflow Protection. The water supply to a bathtub
    52. 409.6 Installation and Access. Bathtubs and whirlpool
    53. 410.1 Application. Bidets shall comply with ASME
    54. 410.2 Backflow Protection. The water supply to the bidet
    55. 410.3 Limitation of Water Temperature in Bidets. The
    56. 411.1 Application. Water closets shall comply with ASME
    57. 411.2 Water Consumption. The effective flush volume of
    58. 412.2 Backflow Protection. A water supply to a urinal
    59. 413.1 Where Required. Each water closet, urinal, clinical
    60. 413.2 Flushometer Valves. Flushometer valves and
    61. 413.3 Flush Tanks. Flush tanks for manual flushing shall
    62. 413.4 Water Supply for Flush Tanks. An adequate quantity of wa…
    63. 413.5 Overflows in Flush Tanks. Flush tanks shall be provided …
    64. 414.1 Application. Domestic dishwashing machines shall
    65. 414.2 Backflow Protection. The water supply connection
    66. 414.3 Drainage Connection. Domestic dishwashing
    67. 414.4 Lead Content. Dishwashing machines shall comply
    68. 415.1 Application. Drinking fountains shall be self-closing
    69. 415.2 Drinking Fountain Alternatives. Where food is
    70. 415.3 Drainage Connection. Drinking fountains shall be
    71. 415.4 Location. Drinking fountains shall not be installed in
    72. 416.1 Application. Emergency eyewash and shower equipment shal…
    73. 416.2 Water Supply. Emergency eyewash and shower
    74. 416.3 Installation. Emergency eyewash and shower equipment sha…
    75. 416.4 Location. Emergency eyewash and shower equipment shall b…
    76. 416.5 Drain. A drain shall not be required for emergency
    77. 417.1 Application. Faucets and fixture fittings shall comply
    78. 417.2 Deck Mounted Bath/Shower Valves. Deck
    79. 417.3 Handheld Showers. Handheld showers shall comply
    80. 417.4 Faucets and Fixture Fittings with Hose Con-
    81. 417.5 Separate Controls for Hot and Cold Water.
    82. 417.6 Low-Pressure Water Dispenser. Beverage faucets
    83. 417.7 Head Shampoo Sink Faucets. Head shampoo sink
    84. 417.8 Footbaths and Pedicure Baths. The water supplied to spec…
    85. 418.1 Application. Floor drains shall comply with ASME
    86. 418.2 Strainer. Floor drains shall be considered plumbing
    87. 418.3 Location of Floor Drains. Floor drains shall be
    88. 418.4 Food Storage Areas. Where drains are provided in
    89. 418.5 Floor Slope. Floors shall be sloped to floor drains.
    90. 419.1 Application. Food waste disposal units shall comply
    91. 419.2 Drainage Connection. Approved wye or other
    92. 419.3 Water Supply. A cold water supply shall be provided
    93. 420.1 Application. Sinks shall comply with ASME
    94. 420.2 Water Consumption. Sink faucets shall have a maximum flo…
    95. 420.3 Pre-Rinse Spray Valve. Commercial food service
    96. 420.4 Waste Outlet. Kitchen and laundry sinks shall have
    97. 421.1 Application. Floor sinks shall comply with ASME
    98. 421.2 Strainers. The waste outlet of a floor sink shall be
    99. 422.1 Fixture Count. Plumbing fixtures shall be provided
    100. 422.3 Fixture Requirements for Special Occupancies.
    101. 422.4 Toilet Facilities Serving Employees and Cus-
    102. 422.2 Separate Facilities. Separate toilet facilities shall
    103. 422.5 Toilet Facilities for Workers. Toilet facilities shall
    104. 422.6 Water Closet Compartment. Public water closets
    105. 422.7 Urinal Partitions. Each urinal shall be separated with
    106. 422.8 Cosmetology. [CA] Each school shall provide pub-
    107. 422.9 Cosmetology Establishments. [CA] Each estab-
    108. 422.10 Commissaries Serving Mobile Food Prepara-
    109. 422.11 Employee Lavatories in Food Establishments.
  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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