Cannot get anything to flow out of permeate line

[GramaCindy]

Thanks everyone for your help. I spoke with Carl and he is sending a new needle valve. It appears that I am having the same issue as you therealtreehugger. Carl is great to work with, awesome customer service!

[therealtreehugger]

Glad I could help. I didn't see it as an issue or problem, I thought that was just how it was supposed to work. Get it to a point you like it, tighten the threaded ring, and you have a reference. As long as it works, you're good!

[30AcreWoods]

That stop is really helpful to lock down the exact location (setting) of the needle valve if you take a break midway through processing the sap and wash the membranes with permeate. When you open up the valve wide for the wash, don't move the ring as you back off (release) the valve. That way, when you are done with the wash, you can close the valve until it stops at the ring and you will be producing the same % concentrate as before. I've found that a 10-gallon wash after about 120-150 gallons of raw sap processed really makes a difference if you have to work through 200-300 or more gallons of sap.