Just installed a new RO system

[Ray]

Originally Posted by james mickelso

Ray, are you still selling RO units?

Yep, I sure do.

I recently had an odd situation in which systems I had built for folks started not working right, even though the exact, same configuration was fine in the past. No matter what I tried, I couldn't fix them, until.... I discovered the manufacturer of the membrane housings stopped installing check-valves in the pure water outlet port, allowing the tank back-pressure to push the pure water back into the flush water line!