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Contamination prevention.

Municipal Code of Chicago § 18-28-601.3
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18-28-601.3 Contamination prevention. Exhaust ducts under positive pressure, chimneys, vents and sanitary storm waste and vent shall not extend into or pass through ducts or plenums.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2687544Fetched: 10/24/2026

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18-28-601.3 | Corpus