RODI problem

[Chowder]

With my RODI unit I am having flow problems. I have good water pressure going into the unit. I have very pour flow out to the extent that I can run the unit for 24 hours and get a whole 2 1/2 gallons of clean water. I have replaced all the filters and ro membrane. I believe they have all been placed in correctly. When I first got the unit I could make 20 gallons in about 6 to 8 hours. I have taken the whole unit apart to see if there were any blocked lines and found none. I have the Aquasafe Maximus 100 gpd unit.
Thanks ,Chris