What is the fermenter in distilling? Nat February 04, 2020 12:38 Updated Follow The container, bucket or vessel that you use to make up and ferment the wash. This will also have an airlock or need a way to release gas as fermentation occurs. Related articles What is an airlock? How much of each ingredient do I need for making a wash for the Air Still? Is it possible to fit more/less than 500 g of carbon in the Filter Pro? How long should an Air Still Wash Fermentation take? Instructions - Air Still Fermentation Kit