Product review (2 stars): Does not do anything as far as filtration when checked ...
Does not do anything as far as filtration when checked with a calibrated TDS meter.  The reading directly out of my faucet was 165.  The waterlines servicing the refrigerator are tapped off of the same sample point. The "Filtered "water was reading TDS  at 155.  Needless to say, there is barely any difference. I doubt that I will be buying these filters again