3138B Spa Pool Special Requirements — 2025 California Building Code
California Building Code (Title 24, Part 2) · 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 Building Code (Title 24, Part 2) § 3138B · Effective January 1, 2026 · Official source: Building Standards Commission
3138B.1 Aeration system.¶
A spa pool aeration and/or jet system shall be completely separate from the recirculation system and shall not be interconnected with any other pool.
3138B.2 Maximum operating temperature.¶
The allowable water temperature of a spa pool shall not exceed 104° F (40° C).
3138B.3 Surface area.¶
The water surface area of a spa pool shall not exceed 250 square feet (23.23 m [2] ).
3138B.4 Maximum depth.¶
The water depth in a spa pool shall not exceed 4 feet (1220 mm).
3138B.5 Emergency shut off switch.¶
A clearly labeled emergency shut off switch for the control of both the recirculation system and the aeration and/or jet system shall be installed adjacent to the spa pool.
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