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