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? Pot Still vs Reflux Still - Which one is better to use? What is ABV? What do I do if I forgot to remove the first 50ml? Why is my still leaking?