Prohibited traps.
Municipal Code of Chicago § 18-29-1002.3
in effect18-29-1002.3 Prohibited traps.
The following types of traps are prohibited:
1. Traps that depend on moving parts to maintain the seal;
2. Bell traps;
3. Crown-vent traps;
4. Separate fixture traps that depend on interior partitions for the seal, except those traps constructed of an approved material that is resistant to corrosion and degradation;
5. "S" traps;
6. Drum traps;
7. Building (house) traps in sanitary sewers.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2692603Fetched: 10/24/2026