Tree Roots In Sewer Lines

1/3/2020 (Permalink)

Tree and shrubs require water and oxygen to grow. The growth rate is affected by many factors including water, minerals, temperature, soil conditions, and depth of the root structure. Roots can be divided into several major parts: permanent roots which provide stabilization or support, and small roots which absorb nutrients and water. Roots can extend to three or four times the height of the three. A very large old tree may have extensive root systems which reach hundreds of feet long.

During drought conditions, roots can travel long distance to find sources of water. A tree or shrub will search anywhere underground, including into a sewer line. If properly sealed and in good condition, a sewer line is not actually susceptible to root invasion. But a small crack or hole will allow moisture to escape from the pipe, or roots to penetrate. To provide nutrients and survive, the roots must try to get inside the pipe and find the source of the moisture. Once there are some small tree roots, known as hair roots, in the sewer line, more will grow to take advantage of the water supply. Roots will grow, increasing both length, width,  and depth inside the line. If left untreated, the roots will eventually entirely block the flow of  waste water inside the pipe. Roots will continue to grow and expand inside a sewer line. What started as a small crack or hole will become a much more serious problem. Pressure inside the pipes also increases from heavy root growth, potentially leading to a total collapse if not treated properly. Frequently the only thing left to do is to have the pipes replaced. Certain pipes are more susceptible to root invasion than others. Clay tile pipe, known as vitrified clay, is relatively weak and easily penetrated by tree roots. In particular, the joints where clay pipe connect as a severe weak point. PVC and concrete pipe are vulnerable too, but they are at least stronger than their clay tile counterparts.