Product review (1 stars): This was either defective and/or used. Exact same filter ...
This was either defective and/or used.  Exact same filter I had in my frig.  This one would not work.  After very close inspection, the small plastic cylinder in the center/at the top was not seated flush with the outside; also inside the small plastic filter it was already stained yellow and appeared to have marks where it had been used.  Returned it!