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Earlier editions: 20222019

Chapter 12 — HYDRONICS

1204.3 Potable Water — 2025 California Mechanical Code

California Mechanical Code (Title 24, Part 4) · 2025 edition · updated 2026-09-25 · 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 Mechanical Code (Title 24, Part 4) § 1204.3 · Effective January 1, 2026 · Official source: Building Standards Commission

Potable water systems shall be identified with a green background with white lettering. The minimum size of letters and length of the color field shall be in accordance with Table 1204.3.

TABLE 1204.3

MINIMUM LENGTH OF COLOR FIELD AND SIZE OF LETTERS

OUTSIDE DIAMETER OF
PIPE OR COVERING
(inches)		 MINIMUM LENGTH
OF COLOR FIELD
(inches)		 MINIMUM SIZE OF
LETTERS
(inches)
1_/2 to 11/_4 8 1_/_2


11_/_2 to 2		 8 3_/_4


21_/_2 to 6		 12 11_/_4

8 to 10		 24 21_/_2


over 10		 32 31_/_2

For SI units: 1 inch = 25.4 mm

TABLE 1203.2

WATER HEATERS

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▸Contents — California Mechanical Code (Title 24, Part 4)
California Mechanical Code (Title 24, Part 4)

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