Water purifier filtering element performance demonstration device

The utility model discloses a water purifier filtering element performance demonstration device which comprises a shell and a cover. A water purifier filtering element can be placed inside the shell which is a hollow cylindrical shell, the cover is mounted at a top opening of the shell and provided with a water outlet, a water inlet and a screw hole, and a water-stop screw is screwed at the screw hole. A plurality of symmetric fastening lugs are arranged on the outer periphery of the top of the shell, and a plurality of symmetric fastening lug holes are arranged on the inner periphery of the lower end of an outer ring of the cover, so that the shell can be mutually fastened with the cover. An annular groove is arranged on the outer periphery of the lower end of an inner ring of the cover, a rubber ring is sleeved in the groove in a surrounding manner, and accordingly liquid in the shell can be prevented from seeping when the cover is mutually fastened with the shell. The demonstration device is used by pourin