Patent ID: 7169302

Claim:
An apparatus which comprises: a bowl having a collar with slots; a filter cartridge that includes an elongated filter medium having a first end and a second end; a first end cap sealed to said first end of said elongated filter medium, said first end cap having at least two flanges formed integrally therewith, said flanges extending outward from an outer vertical surface of said filter medium; a boss on an outer surface of each of said flanges, each said boss configured to cause portions of the collar including the slots to expand outwardly when each said boss is rotated into position until the bosses fit into the slots of said collar; a second end cap sealed to said second cad of said elongated filter medium; a wall of a fluid passageway sealed to said first end cap to provide fluid communication to an open interior within said filter medium; a fluid porous housing surrounding an outside surface of said filter medium; and wherein the filter cartridge and bowl are locked together to be installed and removed as one piece.