The principle of hydrodynamic cleaning is based on the use of a water jet as a working body, which is supplied under high pressure to the working area through special nozzles, destroys and washes away impurities. This procedure is effective in removing deposits such as lime, fats, deposits of iron carbonates, calcium salts, bitumen, concrete, paraffin, gypsum, rubber, glue, varnishes, scale, tartar, polyamides, polyesters, etc.