I have been using the Wingsol faucet filter for several years now. I change the filter every six months according to the instructions. The water quality where I live is terrible. I use the filter for boiling water, plants, ice cubes and pet drinkers. It is very important. If you change the filters you will see that they are working and removing something from the tap water. I will continue to use this product as long as they keep making replacement filters :) I highly recommend this.
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