Another thing that helps is if the suction line is one size larger, I learned that when I grew commercial strawberries. The irrigation pump was a 3" fire pump Then the suction line from the pond was 4"x20'. That gave me far better flow than a 3" x20' did.
If you place the RO within 2-3 feet of the sap supply tank I wouldn't worry, if you need it 15' away, use 1 size larger diameter and no elbows near the pump.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.