It is known to all that the cleaning operations of sewers that are clogged would involve blockage removal from the pipes of the sewer. If there is a blockage in the sewer, a jet pipe of water is directed towards the sewer through the manholes. This will need a human being to enter the sewer so that the jet is guided properly in the direction of the sewer.
There have been a lot of researches and developments that would make it possible to clean the sewers without having to get inside the sewer. Various experimentations have led to newer technologies that have finally improvised a technique that does not require the plumber to enter the sewer. There are inspection cameras which makes it easy to locate the area of the blockage in the sewer. The plumber gets to control the machine with a remote control and move the camera according to his monitor above.