Product review (4 stars): Good filter, good value, fixable? leakage problem
For the first time in the 9+ years that I have used this filter, it leaked, after installation.  I read comments from other users, followed the instructions for flushing out the line coming out from the filter.  (Remove filter.  Install filter bypass cap.  Run 2 gallons of water through.  Reinstall filter.)  It still leaked.  I then took the filter off again, and simply ran a hard stream of tap water directly into the top opening of the filter.  (Be careful.  You could soak yourself with a lot of backsplash, obviously.)  I reinstalled the filter and it quit leaking.  Maybe it would have quit leaking soon anyway.  I don't know, but it beats working to get a refund.  I have left a plastic tub under the filter to catch any further leakage.  There's been none in a month.