I chose not to give 1 star like other reviewers because the size is too big as I knew when I bought it. I read in a previous review that these filters are a bit longer than my Dupone filter housing, but one reviewer said he just cut them to size, so I did exactly that and didn't have to change the filter for 4 months. We have very hard water from a private well and got through the more expensive 2 stage carbon filters (which are more than double the price even for the general purpose version) in about 2-3 weeks during the summer months. I installed this filter in June and the water pressure hasn't dropped at all and the water is still clear and odorless. I haven't gone down to the basement to look at the filter since the first month I installed it, but at the time it seemed to do exactly what it advertises: rusty brown on the outside but still mostly white on the inside, sure Filter everything 5 stages. I will definitely buy them again but it could be years since I bought a pack that big! a garden (although we use as much collected rainwater as possible) with infrequent watering and low water consumption equipment to adjust our water intake. I hope this helps with the longevity of these products for your home!
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