The E 068/E 088 series of return-suction filters has now been expanded by a new series with two sizes that, due to comparable dimensions and interfaces, easily replaces common spin-on filters while improving functionality. An ECO2 (Ecological + Economical) return-suction filter can replace the suction filter, in addition to the return filter, resulting in a reduction in maintenance points. Only the contaminated filter element is changed during maintenance, whereas the filter housing is designed for the service life of the machine.