Our Work Gas leak detection, combustible gas detector and thermal imaging helped to locate the cause - wooden stake penetrating through nylon gas main. Check out this tree root that we removed! Pipe freezing CCTV inspection of pipes to locate cause of blockage caused by building waste - messy builders keep us in business! Liquid Nitrogen freeze for a charged (full and flowing) sewer pump out line in the basement of a multi-storey office building. We don't just freeze water! More tree roots as long as a shovel!