Product review (1 stars): Does not filter water in a measurable way.
Aqua-Pure filters are made in the US under license from the patent holder. This is a cheap Chinese knock-off of uncertain quality. Do not buy this POS if you want a real Aqua-Pure filter.

UPDATE: After seller insisted in Questions that this filter is made in the USA and only assembled in China, I decided to test it to see if his additional claim that it works as well as any other filter is true. I tested it with the TDS meter I use to monitor the RO/DI water purifier I use for my saltwater aquarium. First, I ran 5 gallons of water through this filter installed in my Samsung fridge. The water was black for a while, but it cleared up by gallon 3. Instructions say run it for 5 minutes to flush carbon dust, and it took about 7 minutes to pull 5 G.

Measured TDS for the "Aqua-Pure compatible" was 138 PPM. Then I measured unfiltered tap water, and once again got 138 PPM. I repeated the test three times on each water source and got the same figures, +/- 1 PPM.

Consequently, I know that this device does not filter water at all and is certainly not compatible with Aqua Pure. It works no better than having no filter at all in the fridge.

UPDATE 2: The genuine Aqua Pure doesn't reduce TDS either, so it appears that fridge filters are a waste of money even when they're not falsely promoted.