Product review (5 stars): Not for filtered water
I am really confused with the reviewers that talk about testing water, etc. and are upset when they find out that the water is no different than tap water. The water is tap water. The filter is not for taste or quality of water. The filter is for preventing residue from clogging up your icemaker and water system. My mother and I have the same refrigerator, only hers is a year or so newer (both about 14 years old) Mine has no filter in its design and I no longer have a working icemaker or water dispenser. I now own her refrigerator as well, and it still dispenses both water and ice. She was very good to follow a set schedule of replacing her filters. If you have decreased flow, its probably because of residue or lime clogging up your tubing. This filter does what it is designed for and I would not recommend wasting your money on a water tester. If you want filtered water attach a filter designed for that purpose.