I needed a fairly high capacity reverse osmosis filter to run a 20 gallon whole house humidifier, a 40 gallon hydroponic tank and a kitchen faucet. This device makes it easy. City water at 70 psi probably helps a lot too. The instructions are very detailed and made it easy for me to modify this device to run membranes sequentially to save water. I was pleasantly surprised with the performance, even when my filtered water was running consistently it was 0.018 EC from a 0.4 EC source. The water/waste ratio was very good at 1 gal/1.7 gal. It is worth noting that in order to maintain high performance, the device must be flushed daily.
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