Sanitary sewers flow by gravity so they generally follow the natural slope of the ground. The sewer mains that the city owns and maintains are typically located 8-15 feet below ground. Sanitary sewer backups usually involve sewer pipe blockages in either the city’s main sewer lines or in the private sewer service line which the property owner owns and maintains (sewer line between buildings and the city’s main sewer line).
Sanitary sewer backups can be caused by a number of factors, butt 75% are attributed to FOG buildup.
Learn how properly disposing of fats, oils and grease can help prevent a costly and messy sewer backup.