an improved distillation device which uses a combination of centrifugal and positive displacement pumps to purify raw liquid in an area of limited space . the device includes evaporation assembly having a boiling chamber , a valve and float switches for maintaining the liquid level in the boiling chamber at a predetermined level , and connecting conduit for directing vapor to a condensation apparatus . the condensation assembly includes a condensation chamber , a collection chamber , and at least one bubble tube connecting the two chambers . leading from the collection chamber is first transfer conduit , a tube for permitting vapor to bleed from the collection chamber back to condensation chamber , and second transfer conduit for returning only distillate from collection chamber to condensation chamber to cool condensation chamber .