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Chapter 8 — COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL

Section A4.303 — INDOOR WATER USE

2025 California Green Building Standards Code (Title 24, Part 11) · 2025 edition · updated 2026-07-25 · California

A4.303.1 Kitchen faucets. The maximum flow rate of kitchen faucets shall not exceed 1.5 gallons per minute at 60 psi. Kitchen faucets may temporarily increase the flow above the maximum rate, but not to exceed 2.2 gallons per minute at 60 psi, and must default to a maximum flow rate of 1.5 gallons per minute at 60 psi.

Note: Where complying faucets are unavailable, aerators or other means may be used to achieve reduction.

A4.303.2 Alternate water sources for nonpotable applications. Alternate nonpotable water sources are used for indoor potable water reduction. Alternate nonpotable water sources shall be installed in accordance with the California Plumbing Code.

A4.303.3 Appliances. Install at least one qualified ENERGY STAR dishwasher or clothes washer.

Note: See Section A5.303.3 for nonresidential dishwashers and clothes washers.

A4.303.4 Nonwater urinals and waterless toilets. Nonwater urinals or composting toilets are installed.

Where approved, nonwater urinals with drain cleansing action (formerly hybrid urinals), as defined in Chapter 2, shall be considered nonwater urinals.

A4.303.5 Hot water recirculation systems. One- and two-family dwellings shall be equipped with a demand hot water recirculation system, as defined in Chapter 2. The demand hot water recirculation system shall be installed in accordance with the California Plumbing Code, California Energy Code and the manufacturer’s installation instructions.

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▸ Contents — 2025 California Green Building Standards Code (Title 24, Part 11)
2025 California Green Building Standards Code (Title 24, Part 11)
  1. Chapter 1 — ADMINISTRATION
  2. Chapter 2 — DEFINITIONS
  3. Chapter 3 — GREEN BUILDING
  4. Chapter 4 — RESIDENTIAL MANDATORY MEASURES
  5. Chapter 4 — RESIDENTIAL MANDATORY MEASURES
  6. Chapter 4 — RESIDENTIAL MANDATORY MEASURES
  7. Chapter 4 — RESIDENTIAL MANDATORY MEASURES
  8. Chapter 4 — RESIDENTIAL MANDATORY MEASURES
  9. Chapter 5 — NONRESIDENTIAL MANDATORY MEASURES
  10. Chapter 5 — NONRESIDENTIAL MANDATORY MEASURES
  11. Chapter 5 — NONRESIDENTIAL MANDATORY MEASURES
  12. Chapter 5 — NONRESIDENTIAL MANDATORY MEASURES
  13. Chapter 5 — NONRESIDENTIAL MANDATORY MEASURES
  14. Chapter 6 — REFERENCED ORGANIZATIONS AND STANDARDS
  15. Chapter 7 — INSTALLER AND SPECIAL INSPECTOR QUALIFICATIONS
  16. ▸ Chapter 8 — COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL
    Overview
    1. Section A4.101 — GENERAL
    2. Section A4.102 — DEFINITIONS
    3. Section A4.103 — SITE SELECTION
    4. Section A4.104 — SITE PRESERVATION
    5. Section A4.105 — DECONSTRUCTION AND REUSE OF EXISTING MATERIALS
    6. Section A4.106 — SITE DEVELOPMENT
    7. Section A4.107
    8. Section A4.108 — INNOVATIVE CONCEPTS AND LOCAL ENVIRONMENTAL C…
    9. Section A4.201 — GENERAL
    10. Section A4.202 — DEFINITIONS
    11. Section A4.203 — PERFORMANCE APPROACH FOR NEWLY CONSTRUCTED BU…
    12. Section A4.204 — REQUIREMENTS FOR ALTERATIONS TO EXISTING BUIL…
    13. Section A4.301 — GENERAL
    14. Section A4.302 — DEFINITIONS
    15. Section A4.303 — INDOOR WATER USE
    16. Section A4.304 — OUTDOOR WATER USE
    17. Section A4.305 — WATER REUSE SYSTEMS
    18. Section A4.306 — INNOVATIVE CONCEPTS AND LOCAL ENVIRONMENTAL C…
    19. Section A4.401 — GENERAL
    20. Section A4.402 — DEFINITIONS
    21. Section A4.403 — FOUNDATION SYSTEMS
    22. Section A4.404 — EFFICIENT FRAMING TECHNIQUES
    23. Section A4.405 — MATERIAL SOURCES
    24. Section A4.406 — ENHANCED DURABILITY AND REDUCED MAINTENANCE
    25. Section A4.407 — WATER RESISTANCE AND MOISTURE MANAGEMENT
    26. Section A4.408 — CONSTRUCTION WASTE REDUCTION, DISPOSAL AND RE…
    27. Section A4.409 — LIFE CYCLE ASSESSMENT
    28. Section A4.410 — BUILDING MAINTENANCE AND OPERATION
    29. Section A4.411 — INNOVATIVE CONCEPTS AND LOCAL ENVIRONMENTAL C…
    30. Section A4.501 — GENERAL
    31. Section A4.502 — DEFINITIONS
    32. Section A4.503 — FIREPLACES
    33. Section A4.504 — POLLUTANT CONTROL
    34. Section A4.505 — INTERIOR MOISTURE CONTROL
    35. Section A4.506 — INDOOR AIR QUALITY AND EXHAUST
    36. Section A4.507 — ENVIRONMENTAL COMFORT
    37. Section A4.508 — OUTDOOR AIR QUALITY
    38. Section A4.509 — INNOVATIVE CONCEPTS AND LOCAL ENVIRONMENTAL C…
    39. Section A4.601 — GENERAL
    40. Section A4.602 — RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST
    41. Section A4.602 — RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST…
    42. Section A4.602 — RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST…
    43. Section A4.602 — RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST…
    44. Section A4.602 — RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST…
    45. Section A4.602 — RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST…
    46. Section A4.602 — RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST…
    47. Section A5.101 — GENERAL
    48. Section A5.102 — DEFINITIONS
    49. Section A5.103 — SITE SELECTION
    50. Section A5.104 — SITE PRESERVATION
    51. Section A5.105 — DECONSTRUCTION AND REUSE OF EXISTING STRUCTURES
    52. Section A5.106 — SITE DEVELOPMENT
    53. Section A5.107 — BIRD-FRIENDLY BUILDING DESIGN
    54. Section A5.201 — GENERAL
    55. Section A5.202 — DEFINITIONS
    56. Section A5.203 — PERFORMANCE APPROACH
    57. Section A5.204 — MANDATORY REQUIREMENTS FOR ALTERATIONS TO EXI…
    58. Section A5.211 — RESERVED
    59. Section A5.212 — ELEVATORS, ESCALATORS AND OTHER EQUIPMENT
    60. Section A5.213 — ENERGY EFFICIENT FRAMING
    61. Section A5.301 — GENERAL
    62. Section A5.302 — DEFINITIONS
    63. Section A5.303 — INDOOR WATER USE
    64. Section A5.304 — OUTDOOR WATER USE
    65. Section A5.305 — WATER REUSE
    66. Section A5.401 — GENERAL
    67. Section A5.402 — DEFINITIONS
    68. Section A5.403 — FOUNDATION SYSTEMS
    69. Section A5.404 — EFFICIENT FRAMING TECHNIQUES
    70. Section A5.405 — MATERIAL SOURCES
    71. Section A5.406 — ENHANCED DURABILITY AND REDUCED MAINTENANCE
    72. Section A5.408 — CONSTRUCTION WASTE REDUCTION, DISPOSAL AND RE…
    73. Section A5.409 — LIFE CYCLE ASSESSMENT
    74. Section A5.501 — GENERAL
    75. Section A5.502 — DEFINITIONS
    76. Section A5.504 — POLLUTANT CONTROL
    77. Section A5.507 — ENVIRONMENTAL COMFORT
    78. Section A5.508 — OUTDOOR AIR QUALITY
    79. Section A6.106 — SITE DEVELOPMENT
    80. Section A6.202 — DEFINITIONS
    81. Section A6.203 — PERFORMANCE APPROACH
    82. Section A6.204 — PRESCRIPTIVE APPROACH
    83. Section A6.205 — [OSHPD 1 & 4]—BUILDING ENVELOPE
    84. Section A6.207 — [OSHPD 1, 2 & 4]—HVAC DESIGN, EQUIPMENT AND I…
    85. Section A6.210 — [OSHPD 1, 2 & 4]—APPLIANCES
    86. Section A6.401 — GENERAL
    87. Section A6.407 — [OSHPD 1, 2 & 4]—WATER RESISTANCE AND MOISTUR…
    88. Section A6.408 — CONSTRUCTION WASTE REDUCTION, DISPOSAL AND RE…
    89. Section A6.410 — BUILDING MAINTENANCE AND OPERATION
    90. Section A6.504 — POLLUTANT CONTROL
    91. Section A6.505 — [OSHPD 1, 2 & 4]—INDOOR MOISTURE CONTROL

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