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Earlier editions: 20222019

Index

Index — T

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

– T –

T RATING . . . . . . . . . . . . . . . . . . . . . . . . . . . .222.0, 1404.3,

1405.3, 1406.4

TAILPIECES

Connection . . . . . . . . . . . . . .414.3, 419.2, 910.5, 910.6

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .222.0

Maximum length of . . . . . . . . . . . . . . . . . . . .910.5, 1001.2 Sizes . . . . . . . . . . . . . . . . . .407.5, 408.5, 409.2, 420.4,

B 101.3, B 101.5, B 101.6.1

TANKS

Animals and Insects . . . . . . . . . . . . . . . . . . . . .1503.9.3

Dosing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .H 601.8 Expansion . . . . . . . . . . . . . . . . . . . .608.2, 608.3, 812.1 Flush . . . . . . . . . . . . . . . . . . .208.0, 402.4, 413.1, 601.2

Flushometer . . . . . . . . . . . . . . . . . . . . . .610.11, A 106.3 Freeze protection . . . . . . . . . . . . . . . . . . . . . . .1503.9.4 Gray water systems daily discharge . . . . . . . .1503.8.3 Hot water storage . . . . . . . . . . . . . .608.3, 608.6, 608.7, L 502.2, L 503.3.2

Materials . . . . . . . . . . . . . . . . . . . . . . . . . . .710.8, 810.2

Oil . . . . . . . . . . . . . .1017.1, E 403.12, E 403.13, E 404.6

Rainwater storage . . . . . . . . . . . . . . . .1602.7.3, 1603.6, K 102.2, K 103.3, K 105.0

Reclaimed water storage . . . . . . . . . . . . . . . . . . .1505.4 Septic . . . . . . . . . . . . . . . .714.3, 716.1, 722.2 – 722.4, Appendix H Sump or receiving . . . . . . . . . . . .710.2, 710.7 – 710.10, 810.2, 1101.7 Surge . . . . . . . . . . . . . . . .221.0, 1503.2.1, Table 1503.4 1503.9.1, 1504.10

Urinal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .603.5.2

Water closet . . . . . . . . . . . . . . . . .404.2.2, 405.1, 601.2,

603.5.2, 603.5.3, L 402.2

Water supply . . . . . . . . . . . . . . . . . . . . . . .608.1, 608.6, 608.7, E 502.7, E 506.1

TELEPHONE AND DATA

EQUIPMENT ROOMS . . . . . . . . . . . . . . . . . . . . . . .310.15

TEMPERATURE AND

PRESSURE-RELIEF VALVES . . . . . . . . . . . .504.6, 505.2

TEMPERATURE-LIMITING DEVICES . . . . . . .407.3, 408.4,

409.4, 410.3, 504.5

TEMPORARY USE OF GAS . . . . . . . . . . . . . . . . . . .1207.0

TERMINATION OF VENTS . . . . . . . . . . . . . .509.6.1, 509.8

509.8.1, 906.0, H 501.11

TESTING AGENCY, DEFINITION . . . . . . . . . . . . . . . . . 222.0

TESTS

Air . . . . . . . . . . . . .105.3, 105.3.1, 609.4, 712.3, 723.1,

1107.2.2, 1107.2.3, 1213.1.6

Alternate materials and methods . . . . . . . . . . . . . .301.3

Building sewer . . . . . .102.4.1, 105.2.1, 105.2.1.2, 723.0 Cross-connection . . . . . . . . . . . . . . . . 1502.3, 1502.3.2,

1505.14.2, 1505.14.2.2

Exceptions . . . . . . . . . . . . . . . . . . . . . . .105.3, 1107.2.3

Final . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .712.1

Fuel gas piping . . . . . . . . . . . . . . . . . . . . . . . . . .1213.0 Gauges . . . . . . . . . . . . . . . . . . . . . . . . .318.0, 1203.3.2 Percolation . . . . . . . . . . . . . . . . . . . . . . .1504.3, H 401.0 Reclaimed (recycled) water . . . . . . . . . . . . . . .1505.16 Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105.3 Responsibility for . . . . . . . . . . . . . . . . . . . . . . . .105.2.5 Shower receptors . . . . . . . . . . . . . . . . . . . . . . . .408.8.5 Storm drainage . . . . . . . . . . . . . . . . . . . . . . . . . .1106.0 Testing agency . . . . . . . . . . . . . .222.0, 301.3.1.1, 505.4, 610.2, 1406.4

Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . .609.4, 712.2,

1107.2.1, 1107.2.3

Water supply systems . . . . . . . . . . . . . .105.2.1.1, 609.4 THREADED JOINTS . . . . . . . . . . . .605.1.5, 605.2.3, 605.5.2,

605.11.3, 605.12.3, 605.16.1,

705.1.3, 705.3.4, 705.4.2,

705.6.3, 705.10.2, 1208.5.8,

1208.5.9.1, 1322.5

THREE SINGLE

COMPARTMENT SINKS . . . . . . . . . . . . . . . . . . . . .1001.2

TOILET, DEFINITION . . . . . . . . . . . . . . . . . . . . . . . . . . . 222.0

TOILET FACILITY, DEFINITION . . . . . . . . . . . . . . . . . . . 222.0

TOILET ROOM, DEFINITION . . . . . . . . . . . . . . . . . . . . 222.0

TOILETS . . . . . . . . . . . . . . . . . . . . . . . . .(see Water closets) TOILETS, FAMILY

OR ASSISTED – USE FACILITY . . . . . . . . . . . . . .422.1.2

TRACER WIRE . . . . . . . . . . . . . . . . . . .604.10.1, 1210.1.7.2

TRANSITION GAS RISER . . . . . . . . . . . . . .222.0, 1210.4.4

TRANSITION JOINTS . . . . . . . . . . . . . . . . . . . . . . . .705.9.4

TRAPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Chapter 10

Arms . . . . . . . . . . . . . . . . . .222.0, Table 702.1, 707.14,

1002.2, Table 1002.2, 1002.3

Bar and fountain sinks . . . . . . . . . . . . . . . . .801.4, 902.2

Building . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1008.0

Bottle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1004.1

Condensers and sumps . . . . . . . . . . . . . . . . . . . . .810.1

Crown weir . . . . . . . . . . . . . . . . . . .222.0, 409.6, 905.5,

1001.2, 1002.2, 1002.4

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .222.0

Drum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1004.1

Floor drains . . . . . . . . . . . . . . . . . . . . . . .704.3, 1003.1,

1006.0, 1007.1

Food storage areas . . . . . . . . . . . . . . . . .418.4, 801.3.2 For three-compartment

sinks or three lavatories . . . . . . . . . . . . . . . . . .1001.2

From fixture, distance of . . . . . . . . . . . . . . . . . . . .1001.2

From vent, distance of . . . . . . . . . .1002.2, Table 1002.2

Gray water system . . . . . . . . . . . . . . . . . . . . . .1503.9.6 Grease interceptors . . . . . . . . . . . . . . . . . . . . . .1014.1.1

Indirect wastes . . . . . . . . . . . . . . . . . . . . . . . . . . .803.3

Integral . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1001.2

Island sinks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .909.1

Materials . . . . . . . . . . . . . . . . . . . . .807.2, 906.6, 1003.1

Minimum size . . . . . . . . . . . .702.1, Table 702.1, 1003.3

Nonwater urinals . . . . . . . . . . . . . . . . . . . . . . . . .412.1.1

Prohibited types . . . . . . . . . . . . . . . . . . . . . . . . . .1004.0 Required . . . . . . . . . . . . . . . . . . . . . . . . .1001.0, 1101.15

Seal . . . . . . . . . . . . . . . . . . . . . . .222.0, 412.1.1, 912.2,

1005.0, 1007.1, E 501.6

Seal primer . . . . . . . . . . . . . . . . . . . . . . . .222.0, 1007.1 Separate for each fixture . . . . . . . . . . . . . . . . . . .1001.2 Slip joints . . . . . . . . . . . . . . . . . . . . . . . .705.9.1, 1003.2 Standpipe receptors . . . . . . . . . . . . . . . . . . . . . . .804.1

Storm drains and leaders . . . . . . . . . . . . . . . . . .1101.15

Unions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .315.1

Unit loading . . . . . . . . . . . . . . . . . . .702.0, Table 702.1,

Table 703.2

Vacuum drainage system . . . . . . . . . . . . . . . . . .C 501.0

Vents for . . . . . . . . . . . . . . . . .Table 703.2, 810.1, 901.0,

905.2, 905.5, 908.2.1,

909.1, 1002.0, Table 1002.2

TREATED GRAY WATER, DEFINITION . . . . . . . . . . . . . 222.0

TRENCHING, EXCAVATION,

AND BACKFILLING . . . . . . . . . . . . . . . . . .314.0, 1203.2,

1210.1.1 – 1210.1.2.1, 1323.5.1

TROUGH URINALS,

PROHIBITED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .405.2

TUBING, COPPER . . . . . . . . . . .Table 604.1, 604.3, 604.4,

605.1, 609.1, 609.3, 701.2,

Table 701.2, 903.2, 1208.5.3.3,

A 105.2, E 403.5

TUNNELING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .314.2

TYPE B

GAS VENTS . . . . . . . . . . . . . . .224.0, 509.1, Table 509.4,

509.5.5, 509.6.1, 509.6.2.1,

509.6.2.2, 509.6.3.2,

Table 509.7.3.4(1), 509.7.3.5,

509.10.1.1, 509.10.1.2,

509.10.8.2, 509.10.13, 510.1.6,

510.1.10, 510.2.2, 510.2.15,

510.2.19, 510.2.20,

510.2.22, Appendix G

TYPE BW GAS VENTS . . . . . . . .224.0, Table 509.4, 509.6.1,

TYPE L GAS VENTS . . . . . . . . . . . . . . .224.0, Table 509.4,

509.6.1, 509.6.2.2,

Table 509.7.3.4(1), 509.10.1.1,

509.10.1.2, 509.10.12

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