Product review (5 stars): Easy install, no leaks. Is it really NSF53?
No leaks and easy to install. I have some doubts that it is actually NSF53, since that is so hard to achieve at this price point. I have read that a manufacturer could make just a few that meet the spec, send them in for testing and then the rest would only be NSF42...

Someone may have to test some off Amazon for NSF 53 filtering