Sewer backups can cause extensive damage in a hurry! The City sewer mains, and especially residential sewer service lines, are not designed to handle certain types of waste. Not only can items such as diapers, toys, cups, and styrofoam cause sewer backups, they can also damage lift station pumps.
The type of debris that is being disposed usually causes sewer main blockages. In most cases, the blockages are not the fault of the sewer main. For this reason, the City has not been liable for damages caused by sewer backups. As a homeowner you may want to contact your insurance agent and ask about obtaining insurance coverage to protect you from sewer backups. The best way to prevent sewer backups is to keep foreign objects, fats, and grease out of the sewer.