My son and daughter bought this product and they love it. I was hoping for the same results. We have a lot of TDS in city water and were hoping to get it below what fridge filters are capable of. Our TDS level is 254 from a faucet and 190 from 1 fridge (GE) and 100 from another (Maytag) due to the difference in filters used (which I buy through AMAZON). I used the Zero Water TDS indicator (this is the best filter ever, wish they had a whole house system). Needless to say the TDS speed has increased, higher than when the cock came out, it was 296. I gave it to my son in law and he loves it. It really made a difference and made the water and coffee taste better. Due to my wife's kidney stone problems, we try to keep her TDS use to a minimum. Great product but 4 stars due to lack of TDS drop otherwise it would have been 5 stars.
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