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
Continue researching
Related topics
State and federal sources. Edit the document title or filters, then run your search.
Get a plain-English answer with a citation back to this text.
Ask AI about this code