trees will send their roots anywhere where there is water, and that includes your drain and sewer line. water is flowing through there several times a day, and the slightest leak will allow water into the surrounding soil. your local friendly kansas white oak, douglas fir, or red maple will think to itself “aha!” and send its’ roots over to inspect. then it finds the crack in your drain line and pops its’ roots inside where it gets a drink every time you flush the toilet, have a shower, or do the washing up. soon enough, your drain begins to fill with roots: it happens all the time.
fortunately, our drain 