I have my head tank 24" above the level in my flue pan. The pre-heater is about 12" below the bottom of the head tank or so. On that the sap enters low and exits 6" higher, then it feeds the float valve. It has 4 vents, one on the far end of the entry manifold, 1 on each end of the upper level manifold at tne far end, another on one end of the outlet manifold, plus I have one at the point where the outlet pipe turns down to feed the float valve. The 4 under the hood on the manifolds just have a short nipple and a SS coin vent (used in baseboard heating), the one outside the hood where it turns down to the float valve is about 12" copper tube and then it has a sweat x thread fitting with a vinyl hose (5/16 tubing) that goes up to the rafters, then goes outside to vent. I have no feeding issues.
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.
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