Chapter 4 — PLUMBING FIXTURES AND FIXTURE FITTINGS
408.3 Water Consumption — 2025 California Plumbing Code
California Plumbing Code (Title 24, Part 5) · 2025 edition · updated 2026-10-19 · 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) § 408.3 · Effective January 1, 2026 · Official source: Building Standards Commission
Showerheads shall have a « maximum flow rate of not more than 1.8 gpm at 80 psi ( 6.81 L/m at 552 kPa). Body sprays shall have a flow rate of not more than 1.8 gpm at 80 psi ( 6.81 L/m at 552 kPa). [HCD 1] Residential showerheads shall comply with Division 4.3 of the California Green Building Standards Code (CALGreen). Residential body sprays shall comply with the showerhead requirements in Division 4.3 of CALGreen. [BSC-CG & DSA-SS] Nonresidential body sprays shall comply with the showerhead requirements in Division 5.3 of CALGreen.
408.3.1 Single Showerhead. [BSC-CG & DSA-SS] Showerheads shall have a maximum flow rate of not more than 1.8 gallons (6.81 L) per minute at 80 psi. Showerheads shall be certified to the performance crite- ria of the U.S. EPA WaterSense Specification for Show- erheads in compliance with Chapter 5, Division 5.3. of the California Green Building Standards Code (CAL- Green).
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408.3.2 Multiple Showerheads Serving One Shower. [BSC-CG & DSA-SS] When a shower is served by more than one showerhead, the combined flow rate of all showerheads and/or other shower outlets controlled by a single valve shall not exceed 1.8 gallons (6.81 L) per minute at 80 psi, or the shower shall be designed to allow only one shower outlet to be in operation at a time in com- pliance with Chapter 5, Division 5.3 of the California Green Building Standards Code (CALGreen).
Note: A hand-held shower shall be considered a show-
erhead.
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