I have a Xero pure system mounted on my trailer that feeds off of a 200 gallon tank. I was trying to mimic the Tucker Fill N Go set up. So the system starts with no pressure. It then gravity feeds through a 3/4" line to a 5.5gpm 12v diaphragm pump which maxes out at 70psi. This then feeds through another 3/4" line to the sediment filter, then to the RO, the DI and finally down the 5/16" line to the WFP with an over the top rinse bar. I will concede that I am running a lot longer line of about 215’ from the DI to the WFP. Currently, I am only getting enough water to just clear the edge of the brush from the rinse bar, so maybe a 3 inch arc. I have seen videos of 1-2 foot arcs of water from OtT rinse bars.
What I am noticing however, and I am not sure if this is normal, is the discharge from the RO line of the Xero pure system is a pretty strong steady stream. At first I thought I had put the lines on backwards, but I double checked and that was not the case. When anyone else is running their RO is the discharge line usually at a higher pressure?
Another thing I was thinking to increase my down the line pressure is to add a smaller 1 or 2 gpm pump post DI on the 5/16" line to bump the pressure back up closer to 60psi, but I don’t know if this will cause a “draw vacuum” on the DI or RO filter. Any one have experience with this?