Product review (4 stars): NSF/ANSI 42 Certified, but not NSF/ANSI 53.
Waterdrop UKF8001 Replacement Filters are a low cost alternative to the OEM PUR Filters which are now almost impossible to find. They cost about 1/3rd the price of the OEM PUR Filter, but the bargain comes at a price. They're NSF/ANSI 42 Certified, but not NSF/ANSI 53. In simplistic terms, they don't filter nearly as much contaminants. These filters are designed to reduce specific aesthetic or non-health-related contaminants (chlorine, taste, odor and particulates). That's it. If you're worried about health related contaminants in your water, then you need to use an NSF/ANSI 53 Certified Filter. As for these filters, they fit my Maytag refrigerator fine. There are no leaks, and water pressure is good. My water tastes good and doesn't have any odors. For the price, I have no complaints.