I had 50 GPD and now 100, I only got about 120 GPD before 100 GPD ran out. 50 gpd offers great quality and clean water for the price but I would not recommend 100 gpd as Di-Resin lasts 1/4 longer. I use 2 Di cartridges to extract 0-1ppm water from well water. Sediment and activated carbon cartridges are small and don't last long, and that's the only downside. They are cheap and easy to replace. I get about 200 gallons out of them on average, which is cheaper than buying water for myself. Use a Smart Buddy Booster if you have low pressure and it produces good water at a good rate (I have a booster).
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