End cap which will accommodate flow reversal

摘要

A filter unit uses an end cap design to allow flow reversal from inside-out or outside-in and accommodates a dual collection zone or sump collection bowl. The spin-on filter unit has relieved portions on the end cap to define contaminant channels such that the space between an annular filter media and the filter unit housing is connected to one of the sumps. The contaminant channels allow for prefiltering contaminant removal when the filter connected for radially inward flow and allows for post filtering contaminant removal when the filter unit is connected for radially outward fuel flow.