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Earlier editions: 20222019

Index

Index — V

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

– V –

VACUUM BREAKERS . . . . . . . . . . . .224.0, 412.2, 601.3.4,

Table 603.2, 603.3.2,

603.3.5, 603.3.6, 603.4.4,

603.5.1, 603.5.5, 603.5.6,

603.5.7, 603.5.9, 603.5.13,

603.5.15, 603.5.16, 1303.5,

C 501.3, E 505.4, E 506.1

VACUUM DRAINAGE SYSTEMS . . . . . . . . . . . . . . .C 501.0

VACUUM RELIEF VALVES . . . . . . . . . . . . . . . . .224.0, 504.6,

608.7, 1602.9

VACUUM SYSTEM –

LEVEL 1, DEFINITION . . . . . . . . . . . . . . . . . . . . . . .224.0

VALIDITY OF CODE . . . . . . . . . . . . . . . . . . . . . . . . . . .101.5

VALVES

Access door signs . . . . . . . . . . . . . . . . . . . . . .1505.8.2

Backwater . . . . . . . . . . . . . . . . . . . .204.0, 710.1, 710.3,

710.6, 1006.1, 1503.2.3,

1503.9.1, 1503.9.7,

1603.9, K 105.4

Balancing, definition . . . . . . . . . . . . . . . . . . . . . . .224.0

Ball . . . . . . . . . . . . . . . . . . . . . . . . .606.1, 606.4, 710.4,

710.6

Bathtub filler . . . . . . . . . . . . . . . . . . . . . . . . . . . . .409.5

Check . . . . . . . . . . . . . . . . . . . .603.5.10, 608.3, 710.4,

710.12.1, 710.13.2,

1004.2, 1208.11.1,

1309.11, 1311.5,

1313.5, F 701.3

Combination stop-and-waste . . . . . . . . . . . . . .603.5.17 Combination temperature

and pressure-relief . . . . . . . . . . . . . . . . .505.2, 608.3

Combination thermostatic/

pressure balancing . . . . . . . . . . . . . . . . .205.0, 408.4

Control . . . . . . . . . . . . . . . . . . . . . .408.10, 601.2, 606.5,

606.6, 1303.1, 1306.2,

C 501.3

Diaphragm-type . . . . . . . . . . . . . . . . . . .507.22, 1208.11

Excess flow . . . . . . . . . . . . . . . . . . . . . . . .207.0, 1209.0

Flow balancing . . . . . . . . . . . . . . . . . . . . . . . . . .L 501.7

Flush, definition . . . . . . . . . . . . . . . . . . . . . . . . . . .208.0

Flushometer . . . . . . . . . . . . . .208.0, 411.2.2, 411.2.2.1,

413.1, 413.2, 601.2, 603.5.1,

610.10, Table 610.10,

L 402.2.2

Fullway . . . . . . . . . . . . . . . . . . . . . . . . . . . .606.2, 710.6

Gate . . . . . . . . . . . . . . . . . . .606.1, 606.4, 710.3, 710.4,

710.6

Gray water diverter . . . . . . . . . . . . . . . . . . . . . .1503.2.2

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .310.7

Isolation . . . . . . . . . . . . . . . . . .224.0, F 501.7, F 601.5.1,

F 701.3, F 801.6

Mixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .417.5

Pre-rinse spray . . . . . . . . . . . . . . . . . . . .420.3, L 201.0,

Table L 402.1, L 402.8

Pressure-balancing . . . . . . . . . . . . . . . . . . .218.0, 408.4

Pressure-reducing . . . . . 1504.5.2(6), 1504.5.7, 1603.13,

A 107.2, E 403.13,

F 701.3, K 105.11

Pressure-relief . . . . . . . . . . .504.4, 504.6, 505.2, 507.9,

607.6, 608.2 – 608.6,

1208.10.4, 1306.2, 1308.2,

1308.3, 1309.5, 1310.3,

1310.4, 1315.15, 1316.1,

1324.4, 1324.5, 1327.7.1,

E 302.5, E 302.6, F 501.8,

F 701.3

Quick-acting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .609.11

Riser . . . . . . . . . . . . . . . . . . . . . . . . . . . .224.0, 1314.8,

1323.14.4

Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1505.9.1

Service . . . . . . . . .224.0, 1314.9, 1323.14.5, E 402.4.2

Shutoff . . . . . . . . . . . . . . . . . . . . . .504.6, 606.2, 606.3,

606.6, 608.4, 609.9,

710.12.1, 1202.1,

1203.3.2, 1208.11, 1208.12,

1210.3.3.1, 1210.8.2,

1210.9 – 1210.9.5, 1210.11,

1210.12.5, 1212.3.1, 1212.3.2,

1212.5.3, 1212.6, 1212.7,

1213.2.5, 1213.6.1.4, 1310.3.2,

1312.2, 1314.6, 1323.14,

1327.2, 1503.9.1, E 302.3,

E 402.3, E 402.4.2, E 403.0,

E 403.9, E 403.13, E 404.5,

E 505.4, E 506.1, F 601.1,

K 105.4, L 402.3.1, L 404.6,

L 410.3, L 413.4

Signs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1505.9.2

Source . . . . . . . . . . . . . . . . . . . . .224.0, 1314.6, 1314.7,

1323.14.2, 1324.5.4.2

Temperature relief . . . . . . . . . . . . . .504.5, 504.6, 505.2

Thermostatic . . . . . . . . . . . . . . . . . . . . . . .222.0, 408.4

Vacuum interface . . . . . . . . . . . . . . . . . . . . . . .C 501.2.4

Vacuum relief . . . . . . . . . . . .224.0, 504.6, 607.5, 608.7,

1505.11, 1506.10.3, 1602.9

Zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . .224.0, 1314.4

VENT, PLUMBING . . . . . . . . . . . . . . . . . . . . . . . .Chapter 9

Below trap weir . . . . . . . . . . . . . . . . . . . . .905.5, 1002.4

Branch, definition . . . . . . . . . . . . . . . . . . . . . . . . .204.0

Buildings over 10 stories . . . . . . . . . . . . . . . . . . . .907.1 Changes in direction of . . . . . . . . . . . . . . . . . . . . .903.3

Chemical . . . . . . . . . . . . . . . . . . . . . .811.2, 811.5, 811.6

Combination waste and

vent system design . . . . . . . . . . . . . . . . .205.0, 910.0,

Appendix B

Connections . . . . . . . . . . . . .310.2, 805.0, Table 810.1,

905.1, 905.2, 908.1.2,

908.2.1, 911.2, 1503.2.2

Continuous, definition . . . . . . . . . . . . . . . . . . . . . .205.0

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .224.0

Distance of trap from . . . . . . . . . . .1002.2, Table 1002.2

Double fitting for . . . . . . . . . . . . . . . . . . . . .704.2, 905.6

Engineered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .912.0

Expansion joints . . . . . . . . . . .705.9.2, 1101.5, 1213.2.2

Fittings . . . . . . . . . . . . . . . . . . .701.2, Table 701.2, 903.1

Fixtures, back-to-back . . . . . . . . . . . . . . . .704.2, 905.6

Flagpoling, prohibited . . . . . . . . . . . . . . . . . . . . . .906.3

Flashing for . . . . . . . . . . . . . . . . . . .312.8, 701.5, 906.1,

906.5, 906.6

Frost or snow closure . . . . . . . . . . . . . . . . . . . . . .906.7

Grade of . . . . . . . . . . . . . . . . . . . . . .905.1, 905.3, 911.4

Height above fixture . . . . . . . . . . . . . . . . . . . . . . .905.3

Height above grade . . . . . . . . . . . . . . . . . . . . . . . .906.4

Horizontal . . . . . . . . . . . . . . . .Table 703.2, 904.2, 905.3

Indirect waste . . . . . . . . . . . . . . . . .803.3, 805.1, 902.1

Individual, definition . . . . . . . . . . . . . . . . . . . . . . . .211.0

Interceptors . . . . . . . . . . . . . . . .902.1, 1009.4, 1014.1.1,

1014.2.2, 1016.4, 1017.1

Island sinks and fixtures . . . . . . . . . . . . . . . . . . . .909.0

Length of . . . . . . . . . . .Table 702.1, Table 703.2, 904.0

Material for . . . . . . . . . . . . . . . . . . . . .701.0, Table 701.2,

811.2, 903.0, 1503.9.2

Method of installation . . . . . .310.5, 903.3, 906.2, 906.4

Not required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .902.0

Not to be used as

soil or waste pipe . . . . . . . . . . . . . . . . . . . . . . . .310.4

Opening location . . . . . . . . . . . . . . . . . . .905.5, 1002.4

Parallel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .907.1

Piping, support of . . . . . . . . . . . . . . . . . . . . .Table 313.3

Prohibited . . . . . . . . . . . . . . . . . . .310.4, 903.1, 903.2.2

Relief . . . . . . . . . . . . . . . . . . . . . . . . . . . . .220.0, 805.0,

907.0, 911.3, 1009.4

Required . . . . . . . . . . . . . . . . . . . . . . . . . . .901.2, 904.1

Required separately

on every trap . . . . . . . . . . . . . . . .901.2, 1002.1, 1002.2 Sizing . . . . . . . . . . . . . .Table 702.1, 703.0, Table 703.2,

904.0, 908.1.1, 908.1.2,

908.2.2, 910.4, C 401.0,

Table C 401.1, C 601.2

Special . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .909.0

Stack . . . . . . . . . . . . . . . . . . . . . . . . . . . . .224.0, 906.1,

907.0, C 401.2, C 601.2

Sump . . . . . . . . . . . . . . . . . . . .710.7, 710.10, 710.13.3,

810.1, Table 810.1

System, definition . . . . . . . . . . . . . . . . . . . . . . . . .224.0

Termination . . . . . . . . . . . . . . . . . .905.4, 906.0, 906.2.1

Testing . . . . . . . . . . . . . . . . . . . . . . . . . .712.0, 1504.10 Trap seal protection . . . . . . . . . . . . . . . . . .901.3, 1002.0

Undiminished in

size through roof . . . . . . . . . . . . . . . . . . .905.4, 907.1 Unit loading . . . . . . . . . . . . . . . . . . . . . . . . .Table 703.2

Wet, Horizontal . . . . . . . . . . . . . . . . . . . . . . . . . . .908.2

Wet, Vertical . . . . . . . . . . . . . . . . . . . . . . . . . . . . .908.1

Yoke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .227.0, 907.0

VENTED APPLIANCE, DEFINITION . . . . . . . . . . . . . .224.0

Category I Vented Appliance, definition . . . . . . . . .224.0 Category II Vented Appliance, definition . . . . . . . .224.0 Category III Vented Appliance, definition . . . . . . . .224.0 Category IV Vented Appliance, definition . . . . . . .224.0 VENTILATING HOODS . . . . . . . . . . . . . . . .509.2.4, 509.3.4

VERTICAL-TO-HORIZONTAL

DRAINAGE FITTINGS . . . . . . . . . . . . . . . . . . . . . . .706.4

VERTICAL WET VENTING . . . . . . . . . . . . .(see Wet vents) VIOLATION, NOTICES OF . . . . . . . . . . . . . . . . . . . . . .106.2

VITRIFIED CLAY PIPE . . . . . . . . .701.2, Table 701.2, 705.8,

811.2, Table 1101.4.6

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