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Earlier editions: 20222019

Chapter 11 — REFRIGERATION

1109.5 Underground Piping — 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) § 1109.5 · Effective January 1, 2026 · Official source: Building Standards Commission

Refrigerant piping placed underground shall be protected against corrosion. 1109.5.1 Piping in Concrete Floors. Refrigerant piping installed in concrete floors shall be encased in pipe duct. Refrigerant piping shall be isolated and supported to prevent damaging vibration, stress, or corrosion.

[ASHRAE 15:8.10.4]

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

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