Chapter 4 — PLUMBING FIXTURES AND FIXTURE FITTINGS
418.3 Location of Floor Drains.
California Plumbing Code (Title 24, Part 5) · 2022 edition · updated 2026-09-12 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Floor drains shall be installed in the following areas: (1) Toilet rooms containing two or more water closets or a
combination of one water closet and one urinal, except in a dwelling unit. (2) Commercial kitchens and in accordance with Section
704.3. (3) Laundry rooms in commercial buildings and common
laundry facilities in multi-family dwelling buildings. (4) Boiler rooms.
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