Reverse Osmosis This machine worked excellent, and I'm very happy with it. It saved a lot of hours and wood. Reason for selling, I need at least a 500 GPH R/O GPH 250 Membrane XLE4040 Max presure 300 PSI Year of manufacture 2016 Shallow well pump Procon high pressure pump Contact text or phone 616 four 3 7-two 0 7 1