Wastewater treatment machines, in particular centrifugal separators, in particular for lightweight or heavy materials, in particular grease separators, petrol separators, separators for lightweight mineral liquids, starch separators, coalescence separators; wastewater pumping stations, in particular lifting and transfer station; parts and accessories for the aforesaid goods, in particular prefabricated basins and containers in the nature of metal water storage basins for collecting and storin...