What causes sewer backup and basement flooding?
Service blockage The most common cause of sewer backup is a blockage of the sanitary service piping between the home and the Municipality’s sewer main. Blockages in sewers can be caused by problems with the sewer service line. Soil settlement, misaligned joints, root infiltration or pipe collapses are fairly common causes of blockages. Sewer blockages can also be caused by items such as cooking grease, rags, or pieces of solid debris that have been flushed down a household drain.
