If you have a 3M water filter under your sink you know what the cost of replacing it is. And it's not cheap. I'm not saying it filters water as well as the original 3M filter, but it works and the water tastes good. The specs are pretty good, so you're still getting clean water for about half the price. It's still an activated carbon block and the micron rating is good. You have to make the choice for yourself. For me it works fine.
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