Archimedean screw pumps are capable of pumping heavily contaminated surface water or sewage, and even sand, powder, mud and solid if they are specially designed for this purpose. The compact design comes out of the factory as one piece. The screw, trough, bearings and drive unit are all assembled in a monobloc. This allows for a very high level of precision during assembly in the factory as a result enabling hassle-free shaft alignment during installation at site. The entire construction is then installed onto anchor screws at site.