That was going to be my comment too. With whatever pump you use, look for at least "good for potable water" or food grade. Many do not have food safe seals, they might pump well, but contaminate every gallon they pump.
The housing, impeller and seals should be designed for food.
Lots of the pumps referred to in this thread are using recycled plastics, which could have been in contact with almost anything.
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.