Distillation is a building research in Oxygen Not Included. It is in the third tier of Plumbing. Items in this category refine and convert liquids. Items include: Algae Distiller - Refines Slime into Algae. Water Sieve - Produces clean Water from Polluted Water using Sand. Retrieved from "https://oxygennotincluded.fandom.com/wiki/Distillation?oldid=1644" Categories: Plumbing Research Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.