§ 50.011 SEWER GRADES.
   Sewers constructed shall always be of sufficient grade so that the flows will reach a self-cleansing velocity. The minimum grades of sewers shall be as follows:
Diameter of Pipe (Inches)
Fall in Feet Per 100 Sewer
Diameter of Pipe (Inches)
Fall in Feet Per 100 Sewer
6
0.65
8
0.40
10
0.29
12
0.22
15
0.16
18
0.12
24
0.10
28
0.08
36
0.04
 
(`81 Code, § 50.11) (Ord. 1242, passed 5-25-60) Penalty, see § 50.999