Product review (2 stars): One worked - One did not work
I ordered this filter last year and it installed and worked properly for a year.  Reordered same filter and water is not flowing through it properly, plus at least 4 gallons of water was flushed before water tasted ok.  Loud knocking sound as I try to get water from fridge.  Amazon refunding since it is not a returnable item.  Thank you Amazon customer service!!!