Index — P
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
– P –
PATIENT CARE SPACE, DEFINITION . . . . . . . . . . . . .218.0
PENALTIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106.0
PENETRATION
FIRESTOP SYSTEMS . . . . . . . . . . .218.0, 1404.3, 1405.3
PERCOLATION TESTS . . . . . . . . . . . . . . . .1504.3, H 401.0
PERMITS, REQUIRED . . . . . . . . . . . . .104.1, 502.1, 1501.3,
1601.3, E 101.2, E 302.7,
H 101.9, K 101.3
PERMITS FEES . . . . . . . . . . . . . . . . . . . .104.5, Table 104.5
PIPING
ABS and PVC, residential . . . . . . . .701.2(2)(a), 903.1.1,
1101.4 , 1101.4.2.1
Drainage, changes in direction . . . . . . . . . . . . . . .706.0 Drainage, existing sewers . . . . . . . . . . . . . . . . . . .715.3
Drainage, horizontal slope . . . . . . . . . . . . .708.0, 718.1 Drainage, material . . . .701.2, Table 701.2, 715.1, 720.1 Exposed to sunlight,
ABS and PVC . . . . . . . . . . . . . . . . . . . . . . . . . .906.1
Fuel gas . . . . . . . . . . . . . . . . . . . . . . . . .1208.0, 1210.0 Hangers and supports . . .313.0, Table 313.3, 1210.3.5, 1210.3.5.1, Table 1210.3.5.1,
1323.4 – 1323.4.5
Table 1323.1.4(1) – Table 1323.4.4
Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .601.3
Indirect waste . . . . . . . . . . . . . . . . . . . . . . . . . . . .803.0
Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .609.12.3
Joints and connections . . .(see Joints and connections) Location (OSHPD) . . . . . . . . . . . . . . . . . . . . . . . .310.11 Medical gas, material . . . . . . . . . . . . . . . . . . . . . .1318.0 Plumbing vent, material . . . . . . . . . . .Table 701.2, 903.0 Protection of . . . . . . . . . . . . . . . . . . . . . . . .312.0, 718.3,
1210.1.3 – 1210.1.5
Rehabilitation of . . . . . . . . . . . . . . . . . . . . . . . . . .320.0
Separation in trenches . . . . . . . . . . . . . . . . . . .1505.11 Sprinkler system, lawn . . . . . . . . . . Table 610.3, 612.1, Table A 103.1, A 103.2, M 102.5 Storm drainage, materials . . . . . . . . . .1101.4 – 1101.4.6 Trenching, excavation,
and backfill . . . . . . . . . . . . . . . . . . . . . . . . . . . . .314.0
Underground . . . . . . . . . . . . . . . . . . . .314.4.1, 1210.1.6 Water supply, material . . . . . . . . . . . .604.0, Table 604.1 PITS, SEEPAGE . . . . . . . . . . . . . . . . . .221.0, 714.3, 716.1, 722.2 – 722.4, Appendix H PLUGS, CAPS, CLEANOUT . . . . . . . . . . . . . . .707.1, 707.2
PLUMBING
Additions, alterations,
renovations or repairs . . . . . . . . . . . . . . . . . . . .102.4 Appliances . . . . . . . . . . . . . .218.0, 304.1, 310.5, 313.1, 417.2, 603.4.6, 606.5, Table 610.3,
Table 702.1, 801.7, 803.3, 806.1,
807.0, 808.1, Table A 103.1, L 302.2
Appurtenances . . . . . . . . .218.0, 304.1, 313.1, 603.4.6, Table 610.3, Table 702.1, 814.2.1,
1505.9.2, 1505.11, 1506.10.3,
1602.9, Table A 103.1, L 501.2
Connected to sewer or
private disposal systems . . . . . .304.1, 713.1, L 302.2
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .218.0
Inspection of . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105.0 Official . . . . . . . . . . .(see Authority Having Jurisdiction) Plumbing equipment schedules . . . . . . . . . . . . . .323.0 System, definition . . . . . . . . . . . . . . . . . . . . . . . . .218.0 Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . .105.3, 105.3.1 Uncovered for inspection . . . . . . . . . . . . . . . . . .105.2.1 Vent, definition . . . . . . . . . . . . . . . . . . . . . . . . . . . .218.0
Vent system, definition . . . . . . . . . . . . . . . . . . . . . .218.0
PLUMBING FIXTURES
Access . . . . . . . . . . . . . . . . . . . . . . . . . . . .402.1, 413.2,
416.4, 422.4
Accessibility . . . . . . . . . . . . .403.1, 403.2, 408.6, 408.7
Alternate materials . . . . . . . . . . . . . . . . . . .301.3, 406.3
Approved standards . . . . . . . . . . . .301.2.1, 301.2.2, 408.1,
409.1, 410.1, 411.1, 412.1,
415.1, 416.1, 417.1 – 417.4,
418.1, 420.1
Back-to-back . . . . . . . . . . . . . . . . . . . . . . . . . . . . .704.2
Below curb or sewer level . . . . . . . . . . . . . .710.1, 710.2
Clearance from wall, toilet, urinal . . . . . . . . . . . . .402.5
Connections, drainage . . . . . . . . . .304.1, 406.1, 408.5,
409.2, 415.3, 416.5,
419.2, 420.4, 704.0
Control valves . . . . .408.4, 408.9, 601.2, 606.5 – 606.7,
1303.1, 1505.8, 1506.10
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .218.0
Distance from traps . . . . . .1001.2, 1002.2, Table 1002.2
Fixture units . . . . . . . . . . . . . . . . . . .610.3, Table 610.4,
610.7 – 610.10, Table 610.10,
702.0, Table 702.1, Table 702.2,
703.0, Table 703.2, Table A 103.1,
Table C 303.2, Table C 303.3,
C 501.4, C 501.5
Floor drains . . . . . . . . . . . . .408.8, 414.3, 418.0, 704.3,
801.3.2, 1003.1, 1006.0, 1007.1,
1014.3.2, 1016.1, 1017.1, 1101.11,
1505.1, 1506.1, 1602.1, B 101.5,
B 101.6.1, Table C 304.2,
Table C 304.3, E 501.6
Improper location of . . . . . . . . . . . . . . . . . . . . . . .308.0
Indirect wastes . . . . . . . . . . . . . . . . . . . . . . . . . . .804.1
Installation of . . . . . . . . . . . .402.0, 405.3, 408.4, 408.8,
409.3, 409.6, 412.1.1,
413.1 – 413.3, 413.5,
415.4, 416.3, 418.3
Islands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .909.0
Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .402.2
Material of . . . . . . . . . . . . . .401.0, 406.2 – 406.4, 408.8
Minimum number . . . . . . . . . . . . . . . . . . . . . . . . .422.0
Must be connected to sewer . . . . . . . . . . . .304.1, 713.1
Must be provided with trap . . . . . . . . . . . . . . . . . .1001.2
Overflows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .404.0
Prohibited . . . . . . . . . . . . . . . . . . . . .310.5, 405.0, 910.7
Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .401.2 Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . .402.5, 402.6
Size of waste for . . . . . . . . . .702.0, Table 702.1, 703.0,
Table 703.2
Special fixtures . . . . . . . . . . . . . . . . . . . . . . . . . . .406.0
Strainers and connections . . . . . . . . . . . . .407.5, 408.5
Supply fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . .402.7
Waste connections . . . . . . . .407.5, 408.5, 409.2, 415.3,
416.5, 419.2, 420.4
Water supply required . . . . . . . . . . . . . . . . . . . . . .601.2
POLLUTION . . . . . . . . . . . .218.0, 603.1, Table 603.2, 714.5
POLYVINYL CHLORIDE (PVC)
PIPE OR TUBING
Approved standards,
water supply and DWV . . . . .Table 604.1, Table 701.2
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .218.0
Exposed to sunlight . . . . . . . . . . . . . . . . . . . . . . . .906.1 Flexible tubing for whirlpool bathtubs . . . . . . . . .409.6.2 Joining and connections . . . . . . . . . . . . . . . .(see Joints and connections) Lining for shower receptors . . . . . . . . . . . . . . . . . .408.8
Roof drains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1102.1
POLYETHYLENE (PE) PIPE OR TUBING
Approved standards,
water supply and DWV . . . . . . . . . . . . . .Table 604.1,
Table 701.2
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .218.0
Fuel gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1208.5.4, Table 1215.2(19) – Table 1215.2(23), Table 1215.2(34) – Table 1215.2(36) Joining and connections . . . . . . . . . . . . . . . .(see Joints and connections)
Roof drains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1102.1
POLYETHYLENE-ALUMINUM-POLYETHYLENE
(PE-AL-PE) PIPE OR TUBING
Approved standards, water supply . . . . . . . .Table 604.1
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .218.0
Joining and connections . . . . . . . . . . . . . . . .(see Joints and connections)
POLYETHYLENE OF RAISED
TEMPERATURE (PE-RT) PIPE OR TUBING
Approved standards, water supply . . . . . . . .Table 604.1
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .218.0
Flexible connectors . . . . . . . . . . . . . . . . . . . . . . .604.13
Joining and connections . . . . . . . . . . . . . . . .(see Joints and connections) POLYPROPYLENE (PP) PIPE OR TUBING
Approved standards, water supply . . . . . . . .Table 604.1
Chemical waste . . . . . . . . . . . . . . . . . . . . . . . . . . .811.2
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .218.0
Joining and connections . . . . . . . . . . . . . . . .(see Joints and connections)
Roof drains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1102.1
POLYVINYLIDENE FLUORIDE (PVDF)
PIPE OR TUBING
Chemical waste . . . . . . . . . . . . . . . . . . . . . . . . . . .811.2
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .218.0
POTABLE RAINWATER
CATCHMENT SYSTEMS . . . . . . . . . . . . . . . .Appendix K
POTABLE WATER
Connections . . . . . . . . . . . . . .603.4.4, 603.5.6, 603.5.7,
603.5.10 – 603.5.12,
603.5.14, 603.5.21,
801.5, 1303.5
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .218.0
Devices or assemblies . . . . . . . . . . . . . . . . . . . . .603.2
Disinfection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .609.10
Protection from
heat transfer medium . . . . . . . . . . . .505.4.1, C 302.2
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . .501.1, L 507.0
Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .601.3
Joints and fittings . . . . . . . . . . . . . . .604.2, 604.6, 605.0
Materials . . . . . . . . . . . . . . . . . . . . . .604.1, Table 604.1
Outlets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .603.5.17
Protection of . . . . . . . . . . . . . . . . . . . . . . . .602.0, 603.0
Sizing piping . . . . . . . . . . . . . . . . . . .610.0, Appendix A, Appendix C, Appendix M Supply required . . . . . . . . . . . . . . . . . . . .601.2, E 302.1
Tanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .607.0
Unlawful connection to . . . . . . . .602.0, 603.5.11, 1503.3,
1505.4, 1506.4, 1602.4,
E 502.3, K 102.2
Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .606.0
PRE-RINSE SPRAY VALVES . . . . . . . . . . . . .420.3, L 201.0
PRESSED FITTINGS . . . . . . . . . . . . . . . . .605.1.3, 605.1.3.2,
605.13.1, 605.16.1, 705.7.1
PRESSURE DRAINAGE
CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . .805.0
PRESSURE, EXCESSIVE, WATER . . . . . . . . . . . . . . .608.2
PRESSURE-LOCK-TYPE
CONNECTION, DEFINITION . . . . . . . . . . . . . . . . . .218.0
PRESSURE LOSSES, WATER . . . . . . . . . . . . . . . . . .610.2
PRESSURE REGULATORS
Firefighter breathing air
replenishment systems . . . . . . . . . . . . . . . . . .F 501.8
Fuel gas . . . . . . . . . . . . .507.20, 507.21, 1202.1, 1208.7,
1210.9, 1215.1.3
Medical gas and
medical vacuum . . . . . . . . . . . . . . . . . . . . . .1321.10.2
Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .608.2
PRESSURE-RELIEF VALVES
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .224.0
Differential,
backflow prevention . . . . . . . . . . .603.3.7, Table 603.2
Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .608.5 Firefighter breathing
air replenishment systems . . . . . . . . . . . . . . .F 501.1,
F 501.8, F 701.3
Medical gas and medical vacuum . . . . .1308.2, 1308.3,
1310.4, 1316.1
Water Heaters . . . . . . . . . . . . . . . . .504.4, 504.6, 505.2
Water Supply . . . . . . . . . . . . . . .608.2 – 608.4, E 302.5
PRIMARY SETTLING TANKS . . . . . . . . . . . . . . . . . . .902.1
PRIVACY COMPARTMENT, DEFINITION . . . . . . . . . . . 218.0
PRIVATE OR PRIVATE USE, DEFINITION . . . . . . . . .218.0
PRIVATE SEWAGE
Capacity of system . . . . . . . . . .H 101.7, H 201.0, H 701.1
Construction . . . . . . . . . . . . . . . . . . . .H 501.3, H 601.9,
H 701.3, H 801.3
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .218.0
Design . . . . . . . . . . . . . . . . .H 101.6, H 501.2, H 501.11,
H 901.4, H 901.7
Disposal systems . . . . . . . . . .218.0, 713.2, Appendix H General requirements . . . . . . . . . . . . . . . . . . . . .H 101.2 Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105.0
Location . . . . . . . . . . . . . . .721.0, H 101.8, Table H 101.8
PRIVATE WATER SUPPLY . . . . . . . . .602.2, 602.4, E 302.1
PROHIBITED
Appliances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .310.5 Concealed gas piping . . . . . . . . . . .1210.4.2, 1212.3.1,
1212.5.3, 1323.6
Concealment of defects . . . . . . . . . . . . . . . . . . . . .309.2
Concealment of work
before inspection . . . . . . . . . . . . . . . . . .105.0, 503.2,
1203.0, 1406.1
Connections
Sewer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .714.3
Waste . . . . . . . . . . . . . . . . . .310.3, 404.2, 603.4.4,
805.1, 807.3, 810.1
Water . . . . . . . . . . . . . . . . .602.0, 603.4.4, E 502.3
Copper tubing, use of . . . . . . . . . . .903.2.2, 1208.5.3.3 Damage to drainage system . . . . . .305.1, 312.3, 312.6
Devices . . . . . . . . . . . . . . . . . . . . . . . . . .310.5, 1210.10
Direct drainage . . . . . . . . . . . . . . . . . . . .603.4.4, 805.1,
807.3, 810.1
Discharge . . . . . . . . . . . . . . . .509.1.2, 714.2, 1603.3.2,
K 104.2
Fittings . . . . . . . . . . . . . . . . . . . . . . .310.0, 315.2, 604.2
Fixtures . . . . . . . . . . . . . . . . . . . . . . . . . . . .310.5, 405.0
Food waste disposal,
connection to . . . . . . . . . . . . . . . . . . . . . . . . .1014.1.3
Fuel gas piping . . . . . . . . . . . . . . . .1208.5.3.3, 1210.3.4 Industrial waste disposal . . . . . . . . . . . . . . . . . . . .306.2
Installations . . . . . . . . . . . . . . . . . . . . . . . .312.2, 602.1
Joints and connections . . . . . . .315.2, 605.1.4, 605.6.2,
1321.12.3, 1322.7
Locations . . . . . . . . . . . . . . . . .415.4, 1210.3.4, 1503.6
Materials . . . . . . . . . . . . . . .F 801.4, H 501.10, H 501.13,
K 103.1.1, L 503.1.1
Medical gas and medical vacuum piping . . . . . . . . . . . . . . . . .1323.3.1 Oxygen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1213.1.6 Pipes in concrete or masonry . . . . . . . . . . . . . . . .312.2
Practices . . . . . . . . . . . . . .102.4.1, 104.1, 106.0, 303.1,
305.1, 309.2, 310.0, 312.2,
312.6, 502.1, 602.0, 714.1,
1101.3, 1204.3, 1205.0, 1206.3,
1501.3, K 101.3, L 302.1
Receptors, location of . . . . . . . . . . . . . . . . . . . . . .804.1 Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .310.4
Traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1004.0
Trough type urinals . . . . . . . . . . . . . . . . .405.2, E 501.5
Urinals and water closets on a
combination waste and vent system . . . . . . . . .910.7
Vent termination . . . . . . . . . . . . . . . . . . . . . . . . . .906.3
Water piping . . . . . . . . . . . . . . . . . .312.6, 604.2, 720.1 PROPERTY LINE, TERMINATION OF VENT . . . . . . .906.2
PROTECTION FROM
Corrosion . . . . . . . . . . . . .312.1, 312.4, 402.3, 402.6.2,
402.6.3, 506.9, 507.5, 508.1.2,
509.5.3, 509.7, 509.10.1,
509.10.1.2, 509.10.1.3, 603.5.14.1,
603.5.14.2, 609.3, 710.4,
710.8, 810.2, 811.2, 814.1,
1004.1, 1208.5.3.4, 1208.6.1.1,
1210.1.3, 1210.3, 1210.4.5, 1310.4,
1323.2, 1323.3, 1503.9.1, C 501.3,
E 301.3.2, E 403.5, E 403.6,
E 403.8.2, E 403.8.4, E 502.7,
F 501.4, H 501.3, H 501.13,
K 105.2, K 106.2.2
Decay . . . . . . . . . . . . . . . . . .1503.9.1, H 501.3, K 105.2 Freezing . . . . . . . . . . . . . . . . . .312.6, 603.4.7, 1210.1.4,
1210.7.1, 1603.16
Seismic . . . . . . . . . . . . . . . . . . . . . . . . .507.2, 1323.4.5
PROTECTION OF
Animals and insects . . . . . . . . . . . . . . . . . . . . .1503.9.3
Fuel gas meters . . . . . . . . . . . . . . . .1208.6.1, 1208.6.3 Piping materials and structures . . . . . . . . . . . . . .312.0,
314.4, 1210.1
Potable water supply . . . . . . . . . . . . . . . . . . . . . . .603.0 Trap seals . . . . . . . . . . . . . . . . . .1002.0, 1005.1, 1007.0
Water heaters . . . . . . . . . . . . . . . . . . . . .504.3 – 504.6,
505.2, 507.2,
507.12 – 507.15
PSYCHIATRIC SERVICES . . . . . . . . . . . . . . . . . . . . . .322.0
PUBLIC OR PUBLIC USE, DEFINITION . . . . . . . . . . .218.0
PUBLIC SEWER, DEFINITION . . . . . . . . . . . . . . . . . .218.0
PUBLIC SHOWER FLOORS . . . . . . . . . . . . . . . . . . . .408.8
PUSH FIT FITTINGS . . . . . . . . . . . . . . . . . . .218.0, 605.1.3,
605.1.3.3, 605.2.1
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