§ 18-29-906.1 — Distance of trap from vent
Municipal Code of Chicago (2026 S-74, current through Council Journal of June 17, 2026) · Municipal Code of Chicago § 18-29-906.1
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18-29-906.1 Distance of trap from vent.
Each fixture trap shall have a protecting vent located so that the slope and the developed length in the fixture drain from the trap weir to the vent fitting are within the requirements set forth in Table 18-29-906.1. Exception: The developed length of the fixture drain from the trap weir to the vent fitting for self-siphoning fixtures, such as water closets, shall not be limited. Table 18-29-906.1 Maximum Distance of Fixture Trap from Vent Size of Trap (inches) | Size of Fixture Drain (inches) | Slope (inch per foot) | Distance from Trap (feet) 1 1/4 | 1 1/2 | 1/4 | 5 1 1/2 | 1 1/2 | 1/4 | 5 1 1/2 | 2 | 1/4 | 5 2 | 2 | 1/4 | 5 3 | 3 | 1/8 | 5 4 | 4 | 1/8 | 5 (Amend Coun. J. 10-14-21, p. 37722, Art. IX, § 4)