I purchased the filter block 2 years ago and am very happy with the improved water throughout my home. However, now the filters serve less. The last filter only lasted 2 months before noticing a significant drop in water pressure. I regained most of the pressure after pulling out the filter and hosing the filter down until it turned white. There may have been more rust in city water this summer, but I can't believe it's that much more. The first filters I bought lasted 6-9 months.
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