This invention describes an under-the-counter system for purifying water from an outside source. It first uses a filter to remove sediment and other pollutants, then pushes the water through a reverse osmosis membrane to remove very small impurities, storing the highly purified water in a tank. An optional final filter cleans the water before it reaches your tap. The claims specifically cover this sequence of a pre-filter, reverse osmosis membrane, and a storage tank.
Why it matters: Since 2000, reverse osmosis technology for home use has become significantly more efficient, compact, and affordable, making such multi-stage filtration systems more accessible. Modern systems also often integrate smart monitoring for filter life and water quality, which was less common at the time of filing.
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