I am presently on a septic system. Thanks to a new housing development I now have a sewer line 45 feet from the house. I got the permit and have taken care of the impact fees. I know there is a min. slope when installing sewer drain but I was wandering if you can have too much slope. With my house being on a rise I have about 6feet of drop from the house to the new sewer stand pipe. A friend of mine said if you have too much slope the water will run by the solids and cause a back up. I don't know if he knows what he is talking about cause he is not a plumber.