On non food grade buckets you have no idea what the history of the plastic is. Also, food grade buckets use a much costlier mold releaser than non food grade. There is good resason why food grade costs more. If you want cheaper buckets, go to a bakery for old frosting buckets, or a chinese restaurant for used oil jugs. Then clean them. You will have food grade at the cost of a little elbow grease.
Dave Klish, I recently bought 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.