When trenching to repair pipes and culverts is not an option, trenchless sliplining technology can be a cost-effective solution. Sliplining often eliminates the need to stop traffic, dig/repair roads and buy or rent specialized equipment. Sliplining existing pipe with durable material is an economical method for significantly extending the service life of a system. The method involves the insertion of a smaller diameter pipe into the damaged, larger diameter pipe. Thermoplastic pipe, including high density polyethylene (HDPE), is often the product of choice to rehabilitate deteriorated pipes because of its resistance to elements.