Ultimate Yeast Harvester. It attaches to the bottom of the fermenter. After you do a quick trub dump (see video on page 3), you attach this guy - minus the pressure valve. Then open up the dump valve. Beer fills. As time passes, yeast drops out displacing the beer, and after a few days the whole thing is filled with delicious yeast sludge that can be saved for future batches. Remove from fermenter. Reattach pressure valve and store in fridge. Golding hops in the background.