Minnesota Administrative Rules
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4715.2400 PITCH ON HORIZONTAL DRAINAGE PIPING.
Horizontal drainage piping shall be installed in uniform alignment at uniform slopes in accordance with the following requirements and in no case at a slope which will produce a computed velocity of less than two feet per second, unless otherwise permitted by the administrative authority, based on hydraulic analysis of the piping system.
| Size of Piping | Minimum Slope |
| Less than 3 inches | 1/4 inch per foot |
| 3 inches to 6 inches | 1/8 inch per foot |
| 8 inches and over | 1/16 inch per foot |
Statutory Authority:
MS s 16B.59; 16B.61; 16B.64; 326.37; 326.40; 326B.101; 326B.106; 326B.13; 326B.43; 326B.46
History:
28 SR 146; L 2007 c 140 art 4 s 61; art 6 s 15; art 13 s 4
Published Electronically:
May 14, 2012
Official Publication of the State of Minnesota
Revisor of Statutes