No Trench Philadelphia. A Philadelphia contractor found Perma-Liner by searching for “no trench sewer solutions” on Google. Various calls from Philadelphia homeowners had been trickling in concerning sewer problems with no trench solutions and the contractor decided to find a trenchless repair. Perma-Liner manufacturers cured in place pipe materials and equipment to repair damaged pipes without trenching or excavation. If you live in Philadelphia and would like to see no trench repairs, call Perma-Liner to learn more.