A device for cleaning liquids or gaseous media, having a cup-shaped or pot-shaped housing, having an exchangeable interior precipitating element, a medium inlet for medium to be cleaned, a medium outlet for cleaned medium and a housing cover, removably connected to the housing by a connection. The housing has a first circumferential connector and the housing cover has a compatible second circumferential connector, which can be engaged and disengaged by circumferential twisting relative to each other. The first connector or the second connector have at least one interruption extending in the connector axial direction and the precipitating element has at least one positioning arm which, in the installed state of the precipitating element and when the housing cover is connected to the housing, is received at least partially in the at least one connector interruption, in a position and orientation corresponding to the connector interruption.