Abstract: A compact cleaning plant is provided which has great cleaning effect and is self-cleaning. The apparatus according to the invention has a conical stationary part (1) mounted on the inlet pipe for the cleaning liquid, and on which there is suspended a 90.degree. pipe bend (16), the end of which has a hub (11) with nozzles (12) mounted in a rotatable manner in relation to the pipe bend. In this housing, there is contained a turbine (23) which drives a planet gear (15, 27) for turning the pipe bend (16), while at the same time the hub (11) is turned by means of toothed rims (8, 13) enclosed within the housing (1, 16, 11). The housing is also provided with outlet openings (35) and outlet slots (36, 37) for that part of the liquid (39) which serves to lubricate and clean the bearings, said openings and slots being positioned and configured in such a manner that the diverted out-flowing liquid also sweeps all of the housing's external parts.