TROLINING

flexible tubes of plastic material for sealing pipes, gullies and sewers

concrete, mortar, hydraulic cement

sealing and lining pipes, gullies and sewers; inserting flexible tubes of plastic material in pipes, gullies and sewers; grouting circular spaces in pipes, gullies and sewers; connecting pipes and sewers to gullies and side pipes, clearing and cleaning pipes, gullies and sewers

inspecting and executing air and water-tightness tests on pipes, gullies and sewers