Index — M
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
– M –
MACERATING TOILET SYSTEMS . . . . . . . . .215.0, 710.13
MAIN, DEFINITION . . . . . . . . . . . . . . . . . . . . . . . . . . .215.0 MAINTENANCE . . . . . . . . . .102.2, 102.3, 1009.6, 1014.1.2,
1501.5, Table 1501.5, 1501.6,
1504.6.4, 1504.11, 1505.16,
Table 1505.16, 1601.5, Table 1601.5,
1601.5.1, K 101.5, K 101.5.1,
Table K 104.3.3, L 501.5,
L 504.2
MALLEABLE IRON . . . . . . . . .604.7, Table 604.1, Table 701.2
MANUFACTURED/MOBILE
HOME PARKS AND
RECREATIONAL VEHICLE PARKS . . . . . . . .Appendix E MARKINGS . . . . . . . . . . . . . . . . . . . . . . .(see Identification)
MATERIALS
Alternate . . . . . . . . . . . . . . . . . . . . . . . . .301.3, H 501.13
Approval required . . . . . . . . . . . . . . . . . . . . . . . . . .301.2 Approved standards . . . . . . . . . . . . . . . . . . . . . .301.2.2 Backwater, gate, or ball valves . . . . . . . . . . . . . . .710.6 Building drains . . . . . . . . . . . . . . . . . . . . . . .Table 701.2 Building sewers . . . . . . . . . . . .Table 701.2, 715.1, 720.0 Cesspools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .H 801.0
Cleanouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .707.1
Drainage piping, joints, and fittings . . . . . . . . . . . . . . . . . . .701.2, Table 701.2, 701.3, 705.0
Fuel gas piping, joints, and fittings . . . . . . . . . . . . . . . . . . . .1208.5, 1208.5.1,
1208.5.3 – 1208.5.4,
1208.5.9, 1208.5.10, 1208.5.11
Marking of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .301.2.1 Medical gas and medical vacuum . . . . . . . . . . . .1318.0 Potable water piping, joints, and fittings . . . . . . . . . . . . . . . . . . . .604.0, 605.0 Rainwater catchment system . . . . . .1602.7, Appendix K Septic tanks . . . . . . . . . . . . . . . . . . . . . . . . . . . .H 501.3 Storm drainage pipe . . . . . . . . . . . . . . . . . . . . . . .1101.4
Subsoil drain . . . . . . . . . . . . . . . . . . . . . . . . . . .1101.4.6
Sumps or receiving tanks . . . . . . . . . . . . . . . . . . .710.8 Traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1003.1 Vents (DWV) . . . . . . . . . . . . . . . . . . .Table 701.2, 903.0 MAY, DEFINITION . . . . . . . . . . . . . . . . . . . . . . . . . . . .215.0
MEAT AND POULTRY
PROCESSING PLANTS . . . . . . . . . . . .601.5, 724.0, 1010.2
MEAT PACKING AND SLAUGHTERHOUSES . . . . .1010.0
MEDICAL GAS AND MEDICAL
VACUUM SYSTEMS . . . . . . . . . . . . . . . . . . . .Chapter 13
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1324.4
Aspirators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1303.5 Category 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205.0 Category 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205.0 Category 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205.0 Category 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205.0 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1318.2
Construction documents . . . . . . . . . . . . . . . . . . .1304.3
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .215.0
Health Care Facilities (OSHPD) . . . . . . . . . . . .1304.1.1 Installation requirements . . . . . . . . . . . .1304.0, 1323.0
Joints and connections . . . . . . . . . . . . . . . . . . . .1320.0
Labeling and identification . . . . . . . . . . . . . . . . .1323.13
Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1318.0
Medical air systems . . . . . . . . . . . . . . . . . . . . . . .1312.0 Medical vacuum systems . . . . . . . . . . . . . . . . . . .1319.0 Pipe sizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1323.1, Table 1323.1.4(1) – Table 1323.1.4(6) Pressure-regulating equipment . . . . .1308.0, 1321.10.2
Shutoff valves . . . . . . . . . . . . . . . . . . . . . . . . . . .1318.1
Source System . . . . . . . . . . . . . . . . . . . . . . . . .1304.1.2 Station outlets/inlets . . . . . . . . . . . . . . . . . . . . . .1305.3,
1314.10, 1315.0
Sterilizers and bedpan steamers . . . . . . . . . . . . .1303.4 System certification . . . . . . . . . . . . . . . . . . . . . . .1306.0 Testing and inspection . . . . . . . . . . . . . . . . . . . . .1324.0 Warning system . . . . . . . . . . . . . . . . . . . . . . . . . .1317.0 METALS, INTERMIXING PROHIBITED . . . . . .310.6, 604.1
METER, DEFINITION . . . . . . . . . . . . . . . . . . . . . . . . . . 215.0
METERING FAUCETS . . . . . . . . . . .407.2.4, 407.2.4.1, 417.1.2
MID-STORY GUIDE, DEFINITION . . . . . . . . . . . . . . . .215.0
MINIMUM STANDARDS . . . . . . . . . . . . . . . . . . . . . . . .301.2
MINIMUM PLUMBING
FACILITIES . . . . . . . . . . . . . . . . . .Table 422.1, Table 4-2,
Table 4-3, Table 4-4
MULCH, DEFINITION . . . . . . . . . . . . . . . . . . . . . . . . .215.0
MULCH BASIN
Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1504.5
Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .215.0
Gray water systems . . . . . . . . . . . . . . . . 1504.5 – 1504.5.1
Groundwater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1504.4
Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1504.5.1
Size . . . . . . . . . . . . . . . . . . .1504.2, Table 1504.2, 1504.3
Soil type . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Table 1504.2
Get a plain-English answer with a citation back to this text.
Ask AI about this code