Easy to install, the first filter didn't last long but I took this filter to a small town in Costa Rica where there is a lot of debris in the Water coming out of the taps (at different times, not every day). I know this filter works for scale, if only because other faucets have brown water and the water that goes through this filter is crystal clear and tastes good. I also bought a second filter and it was very easy to replace. This is actually the second one we've bought (I gave the first away as a gift when I thought I wouldn't need it anymore) and we love both.
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