Hey folks. I have a little 50gpd RO system i've set up in my house, just for filling barrels and etc. I've been doing some number crunching with it, and I think something may be wrong! I timed how long it took to produce a litre of pure water. Pretty much 20 minutes, on the nose. So, that means it's producting 5 litres per hour of pure water. So 5 hours for a 25 L drum.. I also measured the waste water. It was about 6 litres, rounding down a little bit. So that's producing 30L of waste water per hour, meaning about 150L of waste water for 25L of pure water. Working out percentages, I come up with 16% (ish) pure water, 84% (ish) waste water. Do these numbers sound right? Seems like a very slow, and wasteful way to get pure water.. 5 hours for a 25 litre drum? if I wanted to go out with say 250L of water, then - I'd need to fill for 50 hours? And I'd waste 1,500 Litres of water??!! What the....???!!!!!