I am planning the installation of a waste pipe (either 3" or 4") over a distance of 46 feet. The drop in elevation over that distance is 30", which I calculate to be aprx .65 inches per foot (instead of the nominal .25 inches per foot). Is .65 inches per foot too much? I COULD excavate more at the high end, and come closer to the .25 inche per foot, but is it worth the extra effort? Also, does the pipe size make a difference?
- posted
18 years ago