Vent stack required.
Municipal Code of Chicago § 18-29-903.2
in effect18-29-903.2 Vent stack required.
A vent stack or a main vent shall be installed with a soil or waste stack whenever continuous vents or other branch vents are required in two or more intervals.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2692450Fetched: 10/24/2026
