Poor quality membrane! Waste of money (and the one I have is the second one I got from the same supplier). Big waste of time to open the whole system several times to find the membrane quality is not good enough. When I tested the water it was not stable on PPM, nor was the PPM low enough (compared to my other brand reverse osmosis system). It was around 50ppm, so the efficiency wasn't high enough. spend money elsewhere.
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