I've had an five stage Geek Pure RO system for about two years now, and one day I couldn't tap more than two gallons per day. As well, the PPM went up to 75. I bought replacement filters as I've done in the past but this time the results were unchanged. I purchased another set of filters and had the same results. There are three other components on the five stage RO system. (1.) Auto Shut Off Valve / 4 Way Valve for Reverse Osmosis RO System-1/4“. (2.) Waste Water Restrictor Flow Limited Valve for Reverse Osmosis System. (3.) Check Valve for Reverse Osmosis RO System 1/4 x 1/4 Inch (DC-020Y) . I purchased all three of these parts and after replacing them my RO system worked like new again. My PPM is now 3, and I can tap as much water as I need. If you are having trouble with your RO, replace these parts and the filters and you'll have a like new RO system.
