I have 2 x 25 liter TPW washes both the same with 6kg ea sugar for a cleaning run. They both bubbled away normally for a week SG dropped to 1000 but checked them with my alc 1 looks below 0% the other right on zero. WTF
Dunno, never tried taking an ABV reading with an alcometer in a wash. Might have to do with viscosity. Some of you might have noticed that a perfectly good pyrex jug that will pour water perfectly , will dribble more of your hard earned 92% on the floor than into the funnel or bottle your trying to put it in.
equipment: (The Pelican) a 2 inch pot / stripper on 25L electric boiler interchangable with T500 reflux still...... 2 1/2 inch pot still on 50L keg (gas burner)..... 3 inch Boka (half share with Draino),...... 4 inch 4 plate perforated plate Bubbler