These conclusions are based on a two-year study of tubes extracted from five locations in Finland, Norway, Denmark and Germany. One copy of the first generation pipe high density PE was in the ground 38, and the pipes of PP are from 10-23 years of operation. The result of the test revealed no excessive wear or damage. The results show a long-term service life of solid and structured sewer pipes. The study took place after 2014 in the United States studies have been conducted on the durability of PVC pipes by employees of the University of Utah, which made of PVC pipe, the life of which is to last more than 100 years. In Europe, the polyolefin pipes are widely used in more than 40 years, but scientific study on the length of service has not been done on the pipes that run with a constant voltage in sewerage and drainage pipes, but without internal pressure, said TEPPFA. And Utah Research TEPPFA confirm that plastic pipes are an alternative to pipes made obsolete materials such as concrete and metal