Underground Connections uses HDPE DR 17 (high density polyethylene) seamless pipe. It is compared to a schedule 80 size pipe. Our pipe is about a half inch thick. The fact that it is so thick and is seamless, the pipe is guaranteed against any future root intrusion for well over 100 years. We are not re-lining the old pipe, which a liner is depending on the integrity of the old pipe. We are replacing your sewer line with a new pipe, while the old pipe is destroyed underground.