Skip to content
CodesChatProject

Earlier editions: 20222019

Index

Index — C

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

– C –

CAPACITY OF

Breathing air cylinders . . . . . . . . . . . . . . . . . . . .F 1001.1 Graywater systems . . . . . . . . . . . . . . . . . . . . . .1503.2.1 Interceptors . . . . . . . . . . . . . . . . . . . . . . . . . . . .1014.2.1 Irrigation field and

mulch basin . . . . . . . . . .1504.2, Table 1504.2, 1504.3

Medical air compressors . . . . . . . . . . . .1310.3.1, 1311.2

Rectangular scuppers . . . . . . . . . . . . . . . . . . . .D 104.0

Sewage ejectors or pumps . . . . . . . . . . . . . . . . . .710.3

Sump pump . . . . . . . . . . . . . . . . . . . . . . . . . . . .1101.6.2

Water heaters . . . . . . . . . . . . . . . . . . .501.1, Table 501.1(1)

CAST-IRON PIPE

Approved standards . . . . . . . . . . . . . . . . . . . . . .301.2.4

Discharge line from ejectors . . . . . . . . . . . . . . . . .710.4

Drainage piping . . . . . . . . . . . . . . . . . . . . . . . . . . .701.2

Fittings . . . . . . . . . . . . . . . . . .301.2.3, 604.6, 1208.5.9.5

Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . .1208.5.11.1

Joining . . . . . . . . . . . . . . . . . . . . . . . . . .705.2, 705.10.1

Prohibited use . . . . . . . . . . . . . . . . . . . .316.1, 1208.5.2

CAULKED JOINTS . . . . . . . . . . . . . . . . . . . . . . . . . .705.2.1

CAULKING FERRULES . . . . . . . . . . . . . .701.6, Table 701.6

CERTIFICATION

Backflow assembly testers . . . . . . . . . . . . .205.0, 603.2

Medical gas or medical

vacuum installers . . . . . . . . . . . . . . . . . . . . . .1323.10

Medical gas or medical

vacuum systems . . . . . . . . . . . . . . . . . . . . . . .1306.0

Pipe welder, definition . . . . . . . . . . . . . . . . . . . . . .225.0

Residential fire sprinklers installers . . . . . . . . . . . .612.1

CESSPOOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .H 801.1

Abandoned . . . . . . . . . . . . . . . . . . . . . . .722.0, H 1101.0

Connections to sewer prohibited . . . . . . . . . . . . . .714.3

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205.0

CHECK VALVES

In drainage systems . . . . . . . . . . . . . . .710.4, 710.12.1,

710.13.2, 1004.2

In firefighter breathing air

replenishment systems . . . . . . . . . . . . . . . . . .F 501.7,

F 601.5.1, F 701.3

In fuel gas systems . . . . . . . . . . . . . . . . . . . . . .1208.7.1

In medical gas and

medical vacuum systems . . . . . . . . .1311.5(2), 1313.5

In water supply systems . . . . . . . . . .Table 603.2, 603.3,

608.3

CHEMICAL RESISTANT GLASS PIPE . . . . . . . . . . . .811.2

CHEMICAL WASTES . . . . . . . . . . . . . . . . . . . . .205.0, 811.0

CHIMNEYS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .509.5

Cleanouts . . . . . . . . . . . . . . . . . . . . .509.5.6.2, 509.5.9

Decorative Shrouds . . . . . . . . . . . .509.5.1.1, 509.5.4.3

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205.0

Existing . . . . . . . . . . . . . . . . . . . . . . .509.5.6, 509.5.6.3

Factory-built . . . . . . . . . . . . . . . . . . . . . . . . . . . .509.5.1

Masonry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .509.5.3

Metal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .509.5.2

Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .509.5.5

Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .509.5.8

Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . .509.5.4

CHLORINATED POLYVINYL

CHLORIDE (CPVC) PIPE OR TUBING

Approved standards, water supply . . . . . . . .Table 604.1

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205.0

Joining and connections . . . . . . . . . . . . . . . .(see Joints

and connections)

Installation, residential . . . . . . . . . . . . . . . . . . . . .604.1.1

CHLORINATED POLYVINYL

CHLORIDE/ALUMINUM/CHLORINATED

POLYVINYL CHLORIDE

(CPVC-AL-CPVC) PIPE OR TUBING

Approved standards, water supply . . . . . . . .Table 604.1

Joining and connections . . . . . . . . . . . . . . . .(see Joints

and connections)

CIRCUIT VENTING . . . . . . . . . . . . . . . . . . . . . . . . . . . .911.0

CLARIFIERS . . . . . . . . . . . . . . . . . . . . . . . . . .205.0, 1009.0

CLEANOUT PLUGS OR CAPS . . . . . . . . . . .707.1 – 707.3,

707.13, 1107.2

CLEANOUTS

Access . . . . . . . . . . . . . . . . . . . . . .707.8, 719.5, 801.3.2

Building sewer . . . . . . . . . . . . . . . . . . . . . . 310.12, 719.0 Change of direction . . . . . . . . . . . . . . . . . .707.4, 719.1,

801.3.2, 803.3, 1002.3

Clearances . . . . . . . . . . . . . . . . . . . . . . . . .707.8, 707.9

Condensate drain . . . . . . . . . . . . . . . . . . . . . . . .814.3.1

Cover plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .707.8

Direction of flow . . . . . . . . . . . . . . . . . . . . . .707.5, 719.4

Horizontal drains . . . . . . . . . . . . . . . . . . . . .707.4, 719.1

Manholes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .719.6

Plugs . . . . . . . . . . . . . . . . . . . . . . . .707.1, 707.2, 707.12

Prohibited use of . . . . . . . . . . . . . . . . . . . . . . . . . .316.1

Size . . . . . . . . . . . . . . . . . . . . . . . . . .707.1, Table 707.1

Soil or drainpipes . . . . . . . . . . . . . . . . . . . . . . . . . .317.1

Where required . . . . . . . . . . . . . . . .707.4, 719.1, 909.1,

910.6, 1002.3, 1008.1,

1017.1, 1101.13.1, E 301.4

CLEARANCE

Cleanouts . . . . . . . . . . . . . . . . . . . . . . . . . .707.8, 707.9

Fuel gas vents . . . . . . . . . .509.7.3.4, Table 509.7.3.4(1),

Table 509.7.3.4(2)

Water heaters . . . . . . . . . . . . . . . . . . . .504.3.1, 504.3.2

CLEAR WATER WASTE

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205.0

Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .812.1

CLINICAL SINKS . . . . . . . . . . . . . . . . .205.0, 413.1, 1303.7

CLOSET BENDS . . . . . . . . . . . . . . . . . . . . . .310.3, 402.6.1

CLOSET RINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . .402.6.1

CLOSET SCREWS . . . . . . . . . . . . . . . . . . . . . . . . . .402.6.2

CLOTHES WASHER SYSTEM

Commercial gray water discharge . . . . . . . .1503.8.2.3

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0

Residential gray water . . . .1503.1.1, 1503.2.2 Exception

CODE, DEFINITION . . . . . . . . . . . . . . . . . . . . . . . . . . .205.0

COLLECTION CENTERS AND

FACILITIES . . . . . . . . . . . . . . . . . . . . . .601.6, 725.0, 1010.3

COMBINATION WASTE AND

VENT SYSTEMS . . . . . . . . . . . . .205.0, 910.0, Appendix B

COMBUSTIBLE

MATERIAL, DEFINITION . . . . . . . . . . . . . . . . . . . . .205.0

COMBUSTIBLE PIPING

INSTALLATIONS . . . . . . . . . . . . . . . . . . . . . . . . . .1404.0

COMBUSTION AIR . . . . . . . . . . . . . . . . . . . . . . . . . . .506.0

COMMISSARIES SERVING MOBILE

FOOD PREPARATION UNITS . . . . . . . . . . . . . . . . .422.10

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0

COMMON VENT, FUEL GAS . . . . . .509.6.3, 509.10.2.2,

509.10.2.3, 509.10.3.1,

509.10.8.2, 510.2.3, 510.2.9,

510.2.15, 510.2.16

COMPLEX SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . .1503.1.3

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.0

COMPRESSION JOINTS . . . . . . . . . . .605.7.1.1, 605.10.1.1

705.2.2, 719.6, 1208.5.10.3

CONCEALED SLIP JOINTS . . . . . . . . . . . . . . . . . . .402.10

CONCEALING OF WORK PROHIBITED

BEFORE INSPECTION . . . . .105.1, 105.2.1.1, 105.2.1.2,

503.2, 1203.2

CONDENSATE WASTE

AND CONTROL . . . . . . . . . . . . . . . . . . . . . .814.0 – 814.6

CONDENSATE PUMPS . . . . . . . . . . . . . . . . . . . . . .814.1.1

CONDENSERS AND SUMPS . . . . . . . . . . . . . . . . . . .810.0

CONDUCTORS,

STORM WATER . . . . . . . . . . . . .205.0, 1101.12.1, 1101.13.1,

1101.16, 1103.0, 1602.6,

1602.7.2, 1603.11, K 103.2,

K 104.5, K 106.4

CONTAMINATION . . . . . . . . . . . . . . . . . . .205.0, 602.2, 602.3,

603.1, 811.1, 1321.8.8,

1321.10.4, 1321.10.7,

C 302.1, F 1101.3

CONTINUOUS VENT, DEFINITION . . . . . . . . . . . . . . .205.0

CONTINUOUS WASTES

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205.0

Materials . . . . . . . . . . . . . . . . . . . . . . . . . . .407.5, 701.4

CONTROL VALVES . . . . . . . . . . . . . . . . . . . .408.4, 408.10,

606.5 – 606.7, 1303.1

COOLING WATER . . . . . . . . . . . . . . . . . . . . . . . . . . . .808.0

COPPER OR COPPER ALLOY

PIPE OR TUBING

Fuel gas . . . . . . . . . . . . . . . . . . . . .1208.5.2.3, 1208.5.3.1,

Table 1215.2(7) – Table 1215.2(13),

E 403.5

Joining and connections . . . . . . . . . . . . . . . . . .(see Joints

and connections)

Medical gas and

medical vacuum . . . . . . . . . . . . . . . . . . . . . . . . . 1318.4,

1319.1, 1323.4.2

Penetrating framing members . . . . . . . . . . . . . . . . . . 312.9

Prohibited use of . . . . . . . . . . . 811.1, 1208.5.2.3, 1208.5.3

Standard weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302.1

Underground drainage and vent . . . . . . . . . . . . . . . . 903.2

Water supply . . . . . . . . . . . . . . . . . . . . . . . . . 604.3, 604.4,

A 105.2, E 302.2.1

COSMETOLOGY . . . . . . . . . . . . . . . . . . . . . . . . . . . . .422.8

Drinking water . . . . . . . . . . . . . . . . . . . . . . . . . . .601.4.3

Establishments . . . . . . . . . . . . . . . . . . . . . . . . . . .422.9

Handwashing Facilities . . . . . . . . . . . . . . . . . . . .601.4.2

Hot-and cold running water . . . . . . . . . . . . . . . .601.4.1

COVERED MULTIFAMILY

DWELLINGS, DEFINITION . . . . . . . . . . . . . . . . . . . . 205.0

CRITICAL CARE AREA,

DEFINITION . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205.0

CRITICAL LEVEL . . . . . . . . . . . . . . . . . .205.0, Table 603.2,

603.5.1, 603.5.2, 603.5.5,

603.5.13, C 501.3

CROSS-CONNECTION CONTROL . . . . . . . . . . . . . . .603.0

CROSS-CONNECTION, DISCOVERED . . . . . . . 1505.14.2.3,

1605.3.3

CROSS-LINKED POLYETHYLENE (PEX)

PIPING OR TUBING

Approved standards, water supply. . . . . . . . Table 604.1

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0

Flexible connectors . . . . . . . . . . . . . . . . . . . . . . . 604.13

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 604.1.2

Joining and connections . . . . . . . . . . . . . . . . (see Joints

and connections)

CROSS-LINKED POLYETHYLENE-ALUMINUM-

CROSSLINKED POLYETHYLENE (PEX-AL-PEX)

PIPING OR TUBING

Approved standards, water supply. . . . . . . . Table 604.1

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.0

Flexible connectors . . . . . . . . . . . . . . . . . . . . . . . 604.13

Joining and connections . . . . . . . . . . . . . . . . (see Joints

and connections)

Get a plain-English answer with a citation back to this text.

Ask AI about this code
Export this section
▸Contents — California Plumbing Code (Title 24, Part 5)
California Plumbing Code (Title 24, Part 5)

GoCodebook provides public access, search, citation, multilingual explanation, and practical interpretation of legally adopted building regulations. It is not a substitute for the official ICC or California code publications.