Minimum size.
Municipal Code of Chicago § 18-29-710.1.2
in effect18-29-710.1.2 Minimum size.
The minimum required pipe size for underground branches from floor drains, laundry trays and sink stacks shall be 2 inches (51 mm).
(Amend Coun. J. 10-14-21, p. 37722, Art. VII, § 11; Amend Coun. J. 12-14-22, p. 58278, Art. VI, § 17; Amend Coun. J. 6-17-26, p. 45214, Art. IV, § 61)
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2692181Fetched: 10/24/2026
