Reverse sloping waste line

reverse slope waste line

The waste line for this home has sagged beneath the crawlspace so that the last 10 feet of the pipe slopes the wrong direction; towards the inside of the house. The sewer waste line should slope 1/4″ per lineal foot towards the exterior.

The homeowner did have a problem with a clogged sewer line a few years ago. The problem was corrected by snaking the line from the exterior. The cause of the problem was never addressed most likely as there was no crawl-space access to this area. Access has since been cut in thru the floor.

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Hergert Seattle Bellevue Everett Washington