Bought to replace an old reverse osmosis system that required a tank. Relatively easy to install (you'll need to check the manufacturer's website for instructions) and very compact. Be aware that the unit requires power, so first look under the sink for an unplugged outlet. Comes with a Total Dissolved Solids (TDS) meter to check the difference between tap and RO water - very nice. So far very satisfied (in use <1 week).
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