A CCTV drain survey is one of the most effective ways to assess the condition of underground drainage, but it is not foolproof and can occasionally miss certain issues.
One reason a CCTV drain survey may miss problems is obstructions within the pipe
Heavy blockages caused by fat, debris, scale or tree roots can prevent the camera from travelling further along the drain, meaning parts of the system may not be fully inspected. In such cases, defects beyond the blockage could go undetected.
Water levels can also affect visibility
If a drain is partially or fully flooded, the camera may not capture clear footage of cracks, fractures or joint displacement. Subtle damage along the lower section of the pipe can be hidden beneath standing water.
Pipe condition and layout are another factor
Older drainage systems may have collapsed sections, sharp bends or changes in diameter that restrict camera access. Similarly, very small hairline cracks or early-stage root ingress can be difficult to spot.
Human error can play a role as well
The accuracy of a CCTV drain survey depends on the experience of the operator and the quality of the equipment used. Professionals can carry out a CCTV drain survey Wolverhampton such as www.wilkinson-env.co.uk/drainage-services-cctv-surveys-midlands/cctv-drain-surveys/wolverhampton/ and can provide information.
CCTV investigations were recently carried out in Ireland to determine issues with the storm water network.
A CCTV survey only shows the internal condition of the pipe
It cannot always detect external issues such as ground movement or soil pressure unless these have affected the pipe structure.
