To measure the correct ratio of pure to waste, get a stopwatch, measure the amount of pure produced, and the amount of waste produced. So let's say after 1 minute you had 1500ml of pure, and 3000ml of waste. Add the two together, which is 4500ml. That is 100%, divide this by 100. Which is 45. To get the percentage of pure and waste, divide the 1500 and 3000 in this example by 45.
1500ml pure = 33.3%
3000ml waste = 66.6%
Simple really, Copy and pasted Tims hard writing being lazy!!
I have as above 60/40 in favour of waste,
So every ltr of pure I have 1.5 ltrs of waste.
This made my tds a bit lower and pumping out pretty quick at 55psi.