Product review (5 stars): Fits great, does what's important
This is one of the few third-party water filters that can replace my super-overpriced OEM UKF8001 while still providing me with the NSF 53 and NSF 401 filtration standards that actually matter. Note that NSF 42 only removes bad taste or smell while doing nothing to actually remove dangerous contaminants. See the NSF website for details on what you should be looking for in a water filter.