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Reverse osmosis creates something like 4 to 6 parts waste for every one part of filtered water. It doesn’t seem sustainable or responsible on scale.

[1] https://inspectapedia.com/septic/RO_Waste_in_Septic_Systems....

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I use a Brondell water filter that solves this problem. It uses less pressure and wastes less water. They have a white paper that goes into more detail about how they accomplished it if you want to Google it.

Otherwise I agree with you. RO technology has mostly stagnated.

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