Got a plumbing or heating problem? we'll fix it. Once our cctv drain inspection identifies defective pipes, we use the latest sonar equipment to accurately pinpoint the exact location together with depth to the nearest cm saving valuable time and money please see our ‘no dig’ page for details of our trenchless repair systems all findings are digitalised onto disc in mpeg, jpeg and pdf files. We employ a team of over 90 people in all areas of trade. First.