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Copper tube joints.

Municipal Code of Chicago § 18-28-1107.4.4
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18-28-1107.4.4 Copper tube joints. Copper tubing used in refrigerating systems containing Group A2, A3, B1, B2 or B3 refrigerants shall be brazed. Soldered joints and mechanical joints shall not be used in such refrigerating systems. (Amend Coun. J. 9-14-21, p. 35949, Art. XI, § 14)
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2688942Fetched: 10/24/2026

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18-28-1107.4.4 | Corpus