1116.2 Field Tests — 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) § 1116.2 · Effective January 1, 2026 · Official source: Building Standards Commission
Refrigerant-containing parts of a system that is field-erected shall be tested and proved tight after complete installation and before the operation. The high and
low sides of each system shall be tested and proved tight at not less than the lower of the design pressure or the setting of the pressure-relief device.
Exceptions:
(1) Compressors, condensers, evaporators, coded pressure vessels, safety devices, pressure gauges, control mechanisms, and systems that are factory tested.
(2) Refrigeration systems containing Group R-22, not exceeding 5 tons of refrigeration capacity (18 kW), and field-piped using approved, factory-charged line sets shall be permitted to be proved tight by observing retention of pressure on a set of charging gauges and soaping connections while the system is operating.
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