For an inside view of drainage conditions, a CCTV survey provides the exact nature and location of any problematic areas and includes;

Full written report
Colour DVD with on-sceen meterage
Drainage Layout drawing
Manhole schedule
Recommendations

A drain test can be carried out in conjunction with the survey and reported in accordance with BS8301:1985 acceptance levels. The information is delivered in a format that is easy to understand and will highlight any water loss from the system.