An axial bearing includes a first piston and a second piston. A number of securing members are connected to the underside of the cover around the opening to secure at least one filter under the opening, the filter being used to prevent any contaminants from the air from entering the petri dish. The method further might include the steps of receiving an image file from a second client device, updating the tracking screen to reflect the submission of the image file, and transmitting the plurality of files to a remote server system. In each case one groove is connected to the at least one groove-shaped longitudinal cutout via a transverse bolt guided there between. Also described, is a method of preserving a potable reservoir of water within a water heater upon the water supply leading to the water heater becoming contaminated.