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Earlier editions: 20222019

Index

Index — B

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

– B –

BACKFILLING . . . . . . . . . . . . . . .314.4, 314.4.1, 1210.1.2.1,

1323.5.1, 1323.5.4, 1323.5.5,

1504.7.2, H 601.2

BACKFLOW

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204.0

Prevention . . . . . . . . . . . . . . . . . . . . . . . . . 602.2, 602.3

Prevention devices

or assembly . . . . . . . . . . . . 603.1, Table 603.2, 603.3

BACKFLOW CONNECTION . . . . . . . . . . . . . . .204.0, 603.0

BACKFLOW PREVENTERS

Approved standards . . . . . . . . . . . . . . . . . . .Table 603.2

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .204.0

For hot water . . . . . . . . . . . . . . . . . . . . . . . . . . .603.4.5

Integral . . . . . . . . . . . . . . . . . . . . . . . . . . . .417.2, 417.3,

417.4, 603.4.6

Prohibited locations . . . . . . . . . . . . . . . . . . . . . .603.4.9

Protection from damage . . . . . . . . . . . . . . . . . . .E 302.6 Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .603.2 BACKFLOW PREVENTION . . . . . . . . . . . . . . .602.3, 603.3

BACK-TO-BACK FIXTURES . . . . . . . . . . . . . . . . . . . .704.2

BACKWATER VALVES

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204.0

Where Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 710.6 BALLCOCKS . . . . . . . . . . . . . . . . . . . .Table 603.2, 603.5.2

BAPTISTRIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .406.1

BATHROOM, HALF, DEFINITION . . . . . . . . . . . . . . . .204.0

BATHROOM GROUP . . . . . . . . . . . . .204.0, 908.2, C 303.0

BATHTUB, PROHIBITED TYPE . . . . . . . . . . . . . . . . .405.3

BATHTUBS AND

WHIRLPOOL BATHTUBS . . . . . . . . . . . . . . . . . . . .409.0

BIDETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .402.5, 410.0

BLOWOFF CONDENSERS . . . . . . . . . . .810.1, Table 810.1

BOARD OF APPEALS . . . . . . . . . . . . . . . . . . . . . . . . .107.0

BODY SPRAY, DEFINITION . . . . . . . . . . . . . . . . . . . .204.0

BOILER BLOWOFF

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .204.0

Discharge requirements . . . . . . . . . . . . . . . . . . . .810.1

BONDING JUMPER

Bonding of CSST fuel gas piping . . . . . . . . . . . . .1211.2

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .204.0

BOTTLING ESTABLISHMENTS . . . . . . . . . . . . . . . .1013.0

BUILDING DRAIN

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .204.0

Existing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102.4.1

Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Table 701.2

Sizing . . . . . . . . . . . . . . . . . .703.0, Table 703.2, 710.5, C 304.2, Table C 304.2

Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .712.0 BUILDING DRAIN (STORM), DEFINITION . . . . . . . . .204.0

BUILDING SEWERS

Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .204.0

Existing . . . . . . . . . . . . . . . . . . . . . . . . . .102.4.1, 715.3

Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .721.0

Material . . . . . . . . . . . . . . . . . .Table 701.2, 715.1, 720.0

Sizing . . . . . . . . . . . . .710.5, 717.0, Table 717.1, C 304.2 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .723.0 BUILDING SUPPLY . . . . . . . . . . . . . . . . . .204.0, Chapter 6 BURRED ENDS . . . . . . . . . . . . . . . . .309.3, 609.1, 701.3.1,

903.3, 1208.5.7, 1321.7.2

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