Abstract: A cover for preventing the spillage of a liquid upon the removal of a filter cartridge from a filter adapter includes a collar member mounted over the filter adapter, and a housing member snap-fitted over the other end of the collar member, whereby the other end of the housing member is cut an angle for exposing a portion of a filter cartridge connected to the filter adapter, thereby permitting easy removal and installation of the filter cartridge with the spill prevention cover in place, the housing member also including along a bottom portion a drainage spout for draining away any liquid collected during removal of the filter cartridge.