Getting to the Root of Sewer Pipe Damage

SAN FRANCISCO — When it comes to preventing sewer problems, most people assume it’s a matter of not putting the wrong things down the toilet or sink drain. However, few realize that the primary cause of damage to a home’s sewer system originates outside the home.

The number one cause of sewer pipe damage is tree roots. Roots can be very aggressive in their search for moisture and are often attracted by water vapor escaping from sewer pipes, especially near small cracks and loose joints. Once the roots have pried their way into the sewer system, they can fill the pipe with hair-like root masses. Tissue paper, grease and other debris in the sewage become caught in the roots, eventually leading to complete obstruction or even breakage of the sewer pipe.

The best way to avoid this problem is to be aware of your sewer pipe’s location prior to planting any trees or hedges. As a general rule, tree roots will extend two and a half times the height of the tree, so keep this in mind when determining the placement of new transplants.