In case you are looking for cleaning the surface that cannot be cleaned otherwise; be it drains or other surfaces that have heavy deposits of hard materials. Then high pressure water jetting is most suitable for you. In this technique very high pressure water blast through specific nozzles is used to clean the hardened surfaces. There are water pumps designed for this purpose and nozzles of different size and shape are used. This technique is dependent upon the high pressure up to 50000 Newtons.