Tree roots in sewer lines are a property owner’s nightmare. If untreated they can result in very costly sewer repair or replacement work. Many property owners wait until the house drain is completely blocked with roots to take action. This may be too late to avoid costly excavation for a sewer line repair or replacement.

Once roots have entered a pipe, if undisturbed, the roots will search for moisture, continue to grow, expand, and completely fill the pipe with multiple hair-like root masses at each point of entry. This scenario is especially the case during summer months when the weather tends to be dry. The expanding root masses then become quickly clogged with toilet tissue, grease, and other debris flowing to the main sewer from homes, resulting in reduced flow and slowed drains. A complete blockage may occur; thereby exerting considerable pressure on a crack or joint of the pipe.  The increased pressure often breaks the pipe and may result in total collapse, which requires repair or replacement.

Copper sulfate is an inexpensive solution to preventing and impeding root growth in house sewer systems. The compound is available at most drug stores and garden centers. Dispensing the copper sulfate directly into a toilet can yield spectacular results in controlling root growth in house sewer systems, but in order for the treatment to be effective, the house drain line must still be flowing to allow for positive results.

Note that some pipe materials are more susceptible to root intrusion than others. Clay tile pipe is easily penetrated and damaged by tree roots. Concrete pipe and PVC pipe may also allow root intrusion, but to a lesser extent than clay pipe.

In the case of our example, the homeowner’s property is aged and contains clay piping.  It is necessary for the homeowner to have the roots cut out of the sewer line. It has also been recommended to the homeowner to use a root treatment to avoid future issues. On a side note, copper sulfate does not harm the tree or plant creating the problem. ;-)