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Vent connection.

Municipal Code of Chicago § 18-29-913.2
in effect
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18-29-913.2 Vent connection. The island fixture vent shall connect to the fixture drain as required for an individual or common vent. The vent shall rise 6 inches (150 mm) vertically above the flood rim level of the fixture being vented before offsetting horizontally or vertically downward before connecting to the outside vent terminal.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2692530Fetched: 10/24/2026

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18-29-913.2 | Corpus