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Copper tubing.

Municipal Code of Chicago § 18-29-605.15
in effect
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18-29-605.15 Copper tubing. Joints between copper or copper-alloy tubing or fittings shall comply with Sections 18-29-605.15.1 through 18-29-605.15.7. (Amend Coun. J. 10-14-21, p. 37722, Art. VI, § 19)
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2691574Fetched: 10/24/2026

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