Product review (3 stars): Inspect before installing!
As with a few other reviewers, the seating of the o-rings on these filters is really iffy. In my case, I installed the filter, gave it a test run, and spent the next 15 minutes mopping up water. After a few tries with the same results, I was ready to throw in the towel (literally and figuratively). I then noticed that the bottom o-ring was sitting on the flange instead of sitting in its groove which is about 1/8-inch above the flange. I moved it up and the leaks stopped. The second filter that I bought also had the o-ring out of position so I am guessing this is not an unusual issue. With the o-rings in the right positions, the filter (so far) seems to be working. I think in the future I will go back to the PuriClean model. Might be more expensive but I have not had a leakage issue in 12 years with that brand.