How It Works

Old, failing sewer pipes can be rehabilitated without excavation using CIPP 

A resin-saturated felt tube made of polyester, fiberglass cloth or a number of other materials suitable for resin impregnation, is inverted or pulled into a damaged pipe. It is usually done from the upstream access point (manhole or excavation). It is possible to invert the liner upstream (e.g. from the downstream access point) but this carries greater risk. It is possible to install a liner from the downstream access point, upstream to a blind end however this carries the highest risk of all the CIPP installation methods. Little to no digging is involved in this trenchless process, making for a potentially more cost-effective and less disruptive method than traditional “dig and replace” pipe repair methods. Contact PLI today for more details on how our solutions can help support your next installation. PLI is part of Waterline Renewal Technologies, which includes APM, LMK, and LightRay.