Trenchless Pipe Lining West Chester Perma-Liner travels to West Chester every year to demonstrate our trenchless pipe lining systems and materials. Trenchless pipe lining technology is a method of rehabilitation for underground West Chester storm and sewer pipes. Trenchless pipe lining saves homes, landscaping and roads from being restored due to the damaged caused by digging and replacing. If you live in West Chester or the Philadelphia area and believe you may need trenchless pipe lining, please call us to learn more!