Return piping.
Municipal Code of Chicago § 18-28-1305.4
in effect18-28-1305.4 Return piping.
Return piping shall connect to the top of the fuel oil tank. Valves shall not be installed on return piping.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2689216Fetched: 10/24/2026
