Patent ID: 8231793
Filing Date: 2012-07-31
Classification: B01D,Y10T

Abstract:
1. A filter cartridge for installation in a base assembly with a housing insert therein; the filter cartridge for filtering a stream of liquid; the filter cartridge comprising: (a) a first media pack having a tubular shape defining a first open interior volume; (b) a second media pack of a higher efficiency than the first media pack; the second media pack having a tubular shape defining a second open interior volume; (c) a center endcap between the first media pack and the second media pack; the center endcap having a first side, an opposite second side, and a tubular wall defining a bore extending between the first and second sides; (d) a seal member surrounding the center endcap oriented to form a seal with a housing insert in a base assembly, when the filter cartridge is operably installed in the base assembly; the seal preventing the first stream of liquid from flowing through the second media pack until it has flown through the first media pack.