Also, on a few of my 3/16 laterals I also add a gauge about 1/2-3/4 (in elevation drop) of the way down to see what the vacuum is there. Since that woods also has 19" vacuum at a vacuum tank, I usually see the same reading as at the top. If the vacuum pump is not running for some reason, the lower gauge reads lower vacuum.
My vacuum tank is being redone this year. I'm going to eliminate vacuum on the tank, then run 23-24" on a releaser. Maybe next year I'll even get a better pump for more vacuum.
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.