Wondering what size tubing guys have after sap is processed thru an RO. I only have 3/4" going from my RO valve panel to my evaporator feedtank and my re-circulation line back to sap tank. I had no problem last year with this size tubing but I did add another couple valves so I could switch around sap tanks and noticed my RO pressure this year is high. Starts around 375psi and by the time I concentrate around 10% its 450psi+. Could the extra valves be causing some back pressure? Or gauge might be bad? My concentrate and high pressure valaves are open way more than I usually run also.
Thanks
Mike