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Vents other than stack vents or vent stacks.

Municipal Code of Chicago § 18-29-916.2
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18-29-916.2 Vents other than stack vents or vent stacks. The diameter of individual vents, branch vents, circuit vents and relief vents shall be not less than one-half the required diameter of the drain served. The required size of the drain shall be determined in accordance with Table 18-29-710B. Vent pipes shall be not less than 1 1/4 inches (32 mm) in diameter. Relief vents for soil and waste stacks in buildings having more than 10 branch intervals shall be sized in accordance with Section 18-29-914.2. (Amend Coun. J. 10-14-21, p. 37722, Art. IX, § 7)
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2692556Fetched: 10/24/2026

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18-29-916.2 | Corpus