Homemade ro question...

[FunnyFarm]

Howdy all...Found me a diagram on here and set out to build a RO....Went over and over the diagram and I'm pretty certain I have it all connected properly.
Sap going in is a bit over 2% sugar and the concentrate coming out is pret near the same...I figure there must be something simple i'm missing.Any suggestions out there?
Thanks for your time

[Clinkis]

Are you getting any permeate coming out? If so, how much? Should be at least 50/50 permeate to concentrate. What kind of pressure are you getting across your membranes. Should be at least 100 psi when you close your needle valve down to a trickle. Any chance you could post a pic? Sounds like you must be missing something simple. I could probably tell from a pic.

[jmayerl]

Refer to your owners manual..........

[FunnyFarm]

Lesson learned for me. Went out to take a picture so I could post it and went over it one more time...Putting the valve on the proper end certainly helped matters.
Concentrate is running about 5% sap was a touch over 2...This sound about right?

[SDdave]

If you're running the Aquatech 8800 series pump homemade RO, you can do a little better. A couple of things to consider that I've learned on here. Higher % raw sap going in is almost limited to just doubling on the concentrate side. I had several runs of 3.5+% and could not really get it over 7%. But lower %'s can get the 75% water removal. I think I averaged about 66% over the year. I found that about 125 PSI was the max that the system could run, started to foul roughly at the halfway point. And lastly, to change the pre-filter often. I actually went to replacing after each day.

Have fun, wish I was still boiling.

SDdave