Patent ID: 8333890

Claim:
A filter cartridge comprising: an outer filter element; and an inner filter element, the outer and inner filter elements each have a respective filtering media, the media of the outer filter element is concentrically arranged around the media of the inner filter element, a first space is defined between the outer and inner filter elements, and a second space is defined within the inner filter element, the outer filter element has a first endplate connected at one end and a second endplate connected at an opposing end, and the inner filter element has a first endplate connected at one end and a second endplate connected at an opposing end, the first endplate of the outer filter element and the first endplate of the inner filter element are connected in a fluid tight seal and define an outlet flow passage, the second endplate of the outer filter element and the second endplate of the inner filter element directly contact each other and define a drain channel, the first space between the filtering media is in fluid communication with the drain channel, and the second space within the inner filter element is in fluid communication with the outlet flow passage, and wherein the second endplate of the outer filter element includes a sealing flange surrounding the drain channel.