Our team recently returned to a site in Thirsk to complete a drainage repair project following investigation work originally carried out the previous year. The works demonstrate how detailed surveying and high-pressure jetting can help identify issues early and allow targeted repairs to be completed efficiently.
The project first began in 2025, when our team attended the site to carry out high-pressure drain jetting and a CCTV survey of the drainage system. Using our Harben DTK drain jetter, capable of operating at pressures of up to 275 bar and 55 litres per minute, the team cleaned the drainage lines to remove debris and restore flow throughout the system.
Once the drains had been cleared, a recordable CCTV inspection was carried out to assess the internal condition of the pipework. This survey identified a section of the drainage line that had sustained damage and required repair. The footage allowed the defect to be accurately located and documented, enabling a clear plan for the repair works to be developed.
Following the survey findings, we were instructed to return to site in 2026 to complete the repair.
For the repair phase, our team mobilised with our own excavator and specialist detection equipment to locate the exact position of the damaged pipework. A CAT scanner was used to identify underground services and confirm the precise location of the pipe before excavation began, ensuring the work could be carried out safely and accurately.
Once the damaged area had been exposed, the defective section of pipe was removed and a new replacement section installed, restoring the integrity of the drainage system.
After completing the repair, the team carried out a full re-jetting of the drainage network to ensure the system was thoroughly cleaned and operating as intended. During the jetting process, specialist nozzles were used to maximise cleaning effectiveness, including the StoneAge Warthog rotary nozzle and an ENZ Grenade Bomb nozzle, both designed to deliver powerful internal pipe cleaning.
Due to the location of the works across the site, our team also supplied the water required for the jetting operation, allowing the work to be completed without relying on the site’s own water supply.
To finalise the project, a post-repair CCTV inspection was carried out to verify that the new pipe section had been installed correctly and that the drainage system was fully operational. This final survey provided confirmation that the repair had been successfully completed and gave the client a recorded inspection of the finished system.
By combining high-pressure jetting, CCTV inspection and in-house excavation capability, the project was able to move efficiently from initial investigation through to repair and final verification, ensuring the drainage system at the site in Thirsk was fully restored and operating as intended.
