Maximum Sugar Concentration

[Buckfever]

What's about the maximum sugar concentration you can get a mid sized RO?

[Bricklayer]

I have had my RO set up 3 different ways with 4” membranes.
1 single 4” , 2 x 4” in series , 4 x 4” in series/parallel
The maximum I was able to get sap concentrated to before the flows slowed right down and damage to the membrane was Probley not too far off was 15%.
This is with 2 passes sometimes 3 passes at 250-300 psi.
I don’t do this often as the flows really drop off the higher concentration you put back through your membrane.
I would say it’s safe to say a 4” setup can easily and safely do 8-10 % concentrate.

[Brian]

I run mine through twice to 7% then to 20% and go.