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Protection from freezing.

Municipal Code of Chicago § 18-29-901.6
in effect
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18-29-901.6 Protection from freezing. All vent pipes shall be adequately protected from freezing or adequately sized to account for frost build- up.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2692436Fetched: 10/24/2026

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