Insupex is a pre-insulated self ducted flexible PEX pipe. The PEX pipe is made of high density cross-linked polyethylene (PEX in short). PEX qualities have been proven by continuous exhaustive testing and long field experience. Insupex is widely used in underground heating and plumbing intallations. It is generally recognised as the industry standard in this area. The pipe is just unrolled in the trench and then covered with soil.