I used a UV light on my infeed line a few years but found it only helped a little because the UV unit did not handle the flow very well. Basically a UV light needs a sap depth of about 1/4" max over the UV bulb to kill any micro organisms and even then it needs enough time to be effective. There are units made for much higher flows but mine was only good for about 4-5 gal/minute and my flow exceeded that.
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.