We have well water with hard [minerals] and use a jug with a ZeroWater filter for coffee. The filter fits in the jug and so far has been good at reducing the PPM readings on the ZeroWater filter tester. I just installed it so can't confirm its lifespan, but if it lasts 3 months it's on par with the OEM filters. My ratings are based on my expectations for the usefulness and quality of the items. I hope this one is helpful.
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