How Much Pitch or "drop" should residential sewer line have to insure proper 'flow' of waste to my septic system. I have new construction and am putting sewer line in (before I pour the basement floor concrete) and I need "inches per foot of line run" information.
Does the pitch drop change once I am outside the footings and on the way out to the septic tank? My septic tank will be approximately 100 feet out from the house and I am on a gradual slope site. I can easily place any depth on the tank and the drain field (proposed) is not within 500 feet of any property line. I am in Stevens County, Washington State and not within the city limits of any incorporated town (I'm WAY OUT).
Thanks for the Help. Dave