I'll say that this may be somewhat of a physics question. On my GE Model # GX1S01R the intake hose (from the water supply) and the output hose (to sink water dispenser) are both at the top of the filter housing (I think is is called the sump housing). The filter sits loosely inside the housing. I always wondered if the water flowed in above the filter and out the other side. How do I know if it is actually being circulated through the filter? Yes, the old filter brown and the new one is white, but, is the water actually being drawn through the filter, or is the filter just sitting in a housing of tap water?