The original user left the filters in place for well over a year, maybe 2+. One of the two froze up and I had to disassemble the entire base unit to clamp and unscrew the filter. Installing the new filter was easy. If you change them annually, this may not happen. Tastes as good as a full reverse osmosis system and much better than tap or cartridge jug brands/types. The flow rate is enough to fill water glasses BUT pouring large amounts of water [> 2 cups/16 oz] to boil can take time and patience.
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