Index — A
California Plumbing Code (Title 24, Part 5) · 2025 edition · updated 2026-10-23 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Cite as: 2025 California Plumbing Code (Title 24, Part 5) · Effective January 1, 2026 · Official source: Building Standards Commission
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ABANDONED
Grease interceptors . . . . . . . . . . . . . . . . . . . . . .1014.3.7 Sewers and sewage disposal . . . . . . . . .722.0, H 1101.0 ACCESS PANELS . . . . . . . . . . . . . . . . . . . . . .317.1, 402.10
ACCESS TO
Appliances . . . . . . . . . . . . . . . . . . .507.25, 508.3, 508.4 Backwater valves . . . . . . . . . . . . . . . . . .710.6, 1101.6.4
1503.2.3, 1503.9.7 Chemical waste system piping . . . . . . . . . . . . . . . .811.4 Cleanouts . . . . . . . . . . . . . . . . . . . . . . . . . .707.8, 719.5
Drips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1210.7.1 Emergency eyewash and shower equipment . . . . . . . . . . . . . . . . . . . . . . .416.4 Flexible connectors . . . . . . . . . . . . . . . .604.5, 1212.5.3
Flushometers . . . . . . . . . . . . . . . . . . . . . . . . . . . . .413.2
Fuel gas meters . . . . . . . . . . . . . . . .1208.7.1, E 402.4.1 Fuel gas piping . . . . . . . . . . . . . . . .1210.3.3.1, 1210.4.4 Fuel gas pressure regulators . . . . . . .1208.7.2, 1210.5.1 Fullway valves . . . . . . . . . . . . . . . . . . . . . . .606.2, 710.6 Grease interceptors . . . . . . . . . . . . . . . . . . . . . .1014.3.4 Indirect waste receptors . . . . . . . . . . . . . . . . . . . .804.1 Interceptors . . . . . . . . . . . . . . . . . . . . . .1009.3, 1009.5, 1016.4, H 901.5
Lapped flanges . . . . . . . . . . . . . . . . . . . . . . .1208.5.11.7
Manholes . . . . . . . . . . . . . . . . . . . . . . . . . . . . .H 501.12
Meters and submeters . . . . . . . . . . . . . 601.2.1, 601.2.1.1,
601.2.1.2, L 407.4 Plumbing fixtures . . . . . . . . . . . . . . . . . . . . . . . . . .402.1 Pool heaters on/off switch . . . . . . . . . . . . . .L 503.3.6(1) Rainwater storage tanks . . . . . . .1603.4, 1603.5, 1603.6, K 105.0, K 105.3.1 Septic tanks . . . . . . . . . . . . . . . . . . . . . . . . . . . .H 501.5 Shutoff valves . . . . . . . . . . . . . . . .606.3, 606.6, 1210.9,
1210.9.1, 1210.9.2,
1210.9.4, 1212.5.3,
1212.6, 1327.2,
E 403.9, E 403.13(2), E 403.13(6) Sumps . . . . . . . . . . . . . . . . . . . . . . . . . . . .710.10, 810.3
Toilet facilities . . . . . . . . . . . . . . . . . . . . . . . . . . . .422.4
Trap seal primers . . . . . . . . . . . . . . . . . . . . . . . . .1007.1 Valve and Appurtenance Access Door Sign . .1505.9.2 Vacuum pumps . . . . . . . . . . . . . . . . . . . . . . . .C 501.2.1
Valves for
nonpotable application . . . . . . . . . . . . . . . . . . .1503.9.5 Vent connectors, fuel gas . . . . . . . . . . . . . . . .509.10.11
Water meters and submeters . . . . . . . 601.2.1, 601.2.1.1,
601.2.1.2, L 407.4 Water pressure regulators and strainers . . . . . . . .608.2 ACCESSIBLE, DEFINITION . . . . . . . . . . . . . . . . . . . .203.0 ACCESSIBLE, READILY, DEFINITION . . . . . . . . . . . .203.0
ACCESSIBLE PLUMBING FACILITIES
For persons with disabilities . . . . . . . . . . . . . . . . .403.2 Protection against contact . . . . . . . . . . . . . . . . . . .403.3 Where required . . . . . . . . . . . . . . . . . . . . . . . . . . .403.1 ACCESSORY DWELLING UNIT, DEFINITION . . . . . . .203.0
ACRYLONITRILE-BUTADIENE-STYRENE
(ABS) PIPE . . . . . . . . . . . . . . . .203.0, Table 313.3, 701.2, Table 701.2, 705.1
705.9.4, 903.1, 1101.4,
1101.4.2.1, 1104.4.2.2
AIR GAPS
Backflow prevention . . . . . . 603.2, Table 603.2, 603.3.1, Table 603.3.1, 603.4.4
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.0
Discharge from drinking
water treatment units . . . . . . . . . . . . . . . . . . . . . 611.2
AIR TANK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .710.11
ALTERATIONS AND REPAIRS
Fuel gas piping . . . . . . . . . . . .1203.1, 1213.1.2, 1213.4.2
Health care facilities . . . . . . . . . . . . . . . . . . . . . . .1301.5
Plumbing systems . . . . . . . . . . . . . . . . . .102.4, 301.2.5 ALTERNATE MATERIALS, DESIGN,
AND METHODS . . . . . . . . . . . . . . . . . . . . . . . . . . . .301.3
ALTERNATE WATER SOURCE
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .203.0
For nonpotable applications . . .Chapter 15, Chapter 16 For special water features . . . . . . . . . . . . . . . . .L 406.1
Future connections . . . . . . . . . . . . . . . . . . . . .1504.9.1
Identification of piping . . . . . . . . . . . . . . . . . . . . .601.3.3 Nonpotable rainwater catchment system . . . . . . . . . . .Table 1601.5, 1602.4
Potable rainwater
catchment system . . . . . . . . . . . . . . . . . . . . . .K 102.2 ANODELESS RISER, DEFINITION . . . . . . . . . . . . . . .203.0
APPLIANCES
Automatically operated . . . . . . . . . . . .509.3.4, 509.5.7.1 Categorized vent diameter/area, definition . . . . . . . . . . . . . . . . . .203.0 Connections to building fuel gas piping . . . . . . . . . . . . . . . . . . . . . . . . .1212.0
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .203.0
Direct-vent . . . . . . . . . . . . . . . .206.0, 509.2.6, 509.5.10.1,
509.8.1, 509.12
In attics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .508.4
Indirect waste type . . . . . . . . . . . . . . . . . . .806.0, 807.0
In under-floor spaces . . . . . . . . . . . . . . . . . . . . . . .508.4
On roofs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .508.0
Vent Connectors . . . . . . . . . . . . . . . . . .509.10, 510.2.11
Venting of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .509.0
APPLICATION FOR PERMIT . . . . . . . . . . . . . . . . . . .104.3
APPROVED, DEFINITION . . . . . . . . . . . . . . . . . . . . . .203.0
APPROVED TESTING
AGENCY, DEFINITION . . . . . . . . . . . . . . . . . . . . . . .203.0
AREA DRAINS . . . . . . . . . . . . . . . . . . . . . . . .203.0, 1101.15
ASBESTOS-CEMENT PIPE . . . . . . . . . . . .Table 510.1.2(5),
Table 510.2(5)
ASPIRATORS . . . . . . . . . . . . . . . . . .203.0, 603.5.9, 1303.5
AUTHORITY HAVING JURISDICTION . . . 1.2.0, 1.2.2, 1.3.0,
1.4.0, 1.5.0, 1.6.0,
1.7.0, 1.8.0, 1.9.0,
1.10.0, 1.11.0, 1.12.0,
1.13.0, 1.14.0,
103.0, 203.0
AUTHORITY TO
Disconnect gas . . . . . . . . . . . . . . . . . . . . . . . . . .1206.0
Plumbing system . . . . . . . . . . . . . . . . . . . . . . . . . .106.5
Render gas service . . . . . . . . . . . . . . . . . . . . . . .1205.0
AUTOMATIC
Drains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .K 106.2.4
Flushometer valves . . . . . . . . . . . . . . . . . . . . . . . .413.2
Pressure relief valve . . . . . . . . . . . . . . . . . . . . . . .608.4
Pumps . . . . . . . . . . . . . . . . . . . . . . . . . .1017.1, 1101.6.2,
C 501.2.5, H 601.8
Seat cover dispensers . . . . . . . . . . . . . . . . . . . . . .411.3
Shutoff . . . . . . . . . . . . . . . . . . . . . . . . . . . .420.3, 504.6
Siphon, septic tanks . . . . . . . . . . . . . . . . . . . . . .H 601.8
Sprinkler systems . . . . . . . . . . . . . . . . . . . . . . .603.5.14 Sumps and receiving tanks . . . . . . . . . . . . . . . . . .710.9
Vent dampers, fuel gas . . . . . . . . . . . .509.14, 509.14.1
AUTO WASH RACKS . . . . . . . . . . . . . . . . . . . . . . . . .1011.0
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