Wastewater treatment machines, in particular separators, in particular for lightweight or heavy materials, in particular grease separators, petrol separators, separators for lightweight mineral liquids, starch separators, coalescence separators; Pumping stations; Parts and accessories for the aforesaid goods (included in class 7), in particular prefabricated basins and containers, covers, floats, equilibrium float valves, closures, gravity barriers, sludge outlets, oil suction devices, filters.;