Cured-in-place pipe (CIPP) is a trenchless technique used to rehabilitate existing underground pipes without excavation. It involves inserting a resin-impregnated tube into the host pipe and using contained heat or ultraviolet light to cure it into a new rigid pipe within the existing pipe. https://hallbook.com.br/blogs/450743/Cured-in-Place-Pipe-A-Proven-Trenchless-Method-for-Rehabilitating