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Slope of horizontal drainage piping.

Municipal Code of Chicago § 18-29-704.1
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18-29-704.1 Slope of horizontal drainage piping. Horizontal drainage piping shall be installed in uniform alignment at uniform slopes. The minimum slope of a horizontal drainage pipe shall be in accordance with Table 18-29-704.1. Table 18-29-704.1 Slope of Horizontal Drainage Pipe Size (inches) | Minimum Slope (inch per foot) 2 1/2 or less | 1/4 3 to 6 | 1/8 8 or larger | 1/16
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2691996Fetched: 10/24/2026

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