© istockphoto [dim_it:pic_desc]Around eight percent of the German drinking water seeps into the ground un-used, which approximately equals a billion liters per day. Across Europe, the rate of loss is even higher with approximately 25 percent. A similar situation can be found for waste water: approximately a third of the waste water system shows faults and defects. Plastic pipes are increasingly used because of their quick and simple installation. The repair of (often aging-related) damages on underground pipes and sewers nowadays mostly utilizes repair methods that do not require digging and therefore avoid damage to streets and sidewalks. Different methods are available, such as the insertion of partial liners or flexible pipe or tube strands. The common factor is the insertion of a synthetic tube impregnated with synthetic resin (epoxy resin or polyurethane resin) or a flexible tube made of polyethylene or polypropylene into the damaged pipe and the leaks are sealed. (Photo: istockphoto)[/dim_it:pic_desc]