As cities and agencies implement sanitary sewer assessment programs, they must decide on their approach to CCTV inspections.
Essentially, there are two schools of thought when it comes to inspecting sewers. The first is to inspect the pipeline without prior cleaning, on the belief that information about the maintenance status of the line is an important part of the assessment. If the pipe is cleaned before the inspection, then information on grease, roots and sediment buildup is lost.
The other approach is to clean the sewer before the inspection, based on the idea that obstructions are then removed that would otherwise block
