Patent ID: 7361271

Claim:
An environmentally friendly filter cartridge containing no metal parts, and comprising in combination: a non metallic venturi centertube having a venturi throat and at least one venturi port, a bypass filter coaxial with the venturi centertube, and a first flow passage between the bypass filter and the venturi centertube for dual filtered fluid, a full flow filter mounted coaxial with the bypass filter, the full flow filter having a bore which is larger than the outer periphery of the bypass filter to create a second flow passage, a first non metallic endcap coupling an end of the bypass filter to an end of the venturi centertube, a second non metallic endcap joining the full flow filter, the bypass filter and the venturi centertube, the second endcap having a central passage fluidly connected to the venturi centertube for flow of fluid from the cartridge, the second endcap having a skirt-like radial seal gasket, and a third endcap enclosing an end of the cartridge and sealingly joined to the full flow filter element.