Chapter 15 — ALTERNATE WATER SOURCES FOR NONPOTABLE APPLICATIONS
1505.13 Signage — 2025 California Plumbing Code
California Plumbing Code (Title 24, Part 5) · 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 Plumbing Code (Title 24, Part 5) § 1505.13 · Effective January 1, 2026 · Official source: Building Standards Commission
. Signs in rooms and water closet tanks in buildings using reclaimed (recycled) water shall be in accordance with Section 1505.13.1, Section 1505.13.2, and Section 1505.13.3. Signs on access doors to valves and appurtenances shall be in accordance with Section 1505.9.2 .
1505.13.1 Commercial, Industrial, Institutional, and Residential Restroom Signs. A sign shall be installed in each restroom of commercial, industrial, and institutional occupancies, and in residential common use areas using reclaimed (recycled) water for water clos- ets, urinals, or both. Each sign shall contain letters of a highly visible color on a contrasting background with a character height as specified in the California Building Code (California Code of Regulations, Title 24, Part 2), Section 1143A.5 and Section 11B-703.5. The location of the sign(s) shall be such that the sign(s) are visible to users and shall be approved by the Authority Having Jurisdiction. The sign(s) shall contain the following text:
“TO CONSERVE WATER, THIS BUILDING USES RECY- CLED WATER TO FLUSH TOILETS AND URINALS.”
1505.13.2 Tank-Type Toilet Signs. Where tank-type toilets (water closets) are flushed with recycled water, a permanent sign (such as plastic or stainless steel) shall be installed inside the tank to warn that the water within the tank is not a suitable emergency drinking water sup- ply. The sign shall be labeled: “CAUTION: NON- POTABLE RECYCLED WATER – DO NOT DRINK.”
1505.13.3 Equipment Room Signs. Each room con- taining reclaimed (recycled) water equipment shall have a sign posted in a location that is visible to anyone work- ing on or near reclaimed (recycled) water equipment with the following wording in 1 inch (25.4 mm) letters on a purple background:
“CAUTION: NONPOTABLE RECYCLED WATER, DO NOT DRINK. DO NOT CONNECT TO DRINKING
WATER SYSTEM. NOTICE: CONTACT BUILDING
MANAGEMENT BEFORE PERFORMING ANY WORK
ON THIS WATER SYSTEM.”
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