SECTION P-704 DRAINAGE PIPING INSTALLATION
P-704.1 Slope of horizontal drainage piping. Horizontal drainage piping shall be installed in uniform alignment at uniform slopes. The slope of a horizontal drainage pipe shall be not less than that indicated in Table 704.1 except that where the drainage piping is upstream of a grease interceptor, the slope of the piping shall be not less than 1/4 inch per foot (2 percent slope). Building sewer force mains are not permitted.  387
TABLE P-704.1
SLOPE OF HORIZONTAL DRAINAGE PIPE
 
SIZE
(inches)
MINIMUM SLOPE
(inch per foot)
2-1/2 3 or less
1/4a
3 4 to 6
1/8a
8 or larger
1/16a
* * *
P-704.5 Dead ends. In the installation or removal of any part of a drainage system, dead ends shall be prohibited. Cleanout extensions and approved future fixture drainage piping shall not be considered as dead ends.

 

Notes

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   Amended, Bill No. 230653 (approved December 20, 2023), effective April 1, 2024.