Abstract: A compact, fully automatic water distilling unit is disclosed consisting of a tubular vaporizing tank with an attached condenser preheater disposed alongside which receives incoming feed water, prior to entry into the vaporizing tank via a rim trough extending about the tank. The assembly is adapted to be wall mounted and to discharge distilled water into a reservoir tank. The automatic controls include a float switch in the vaporizing tank controlling the inflow of fill water, a low level safety switch in the reservoir shutting off the heater upon the decline of water level below a minimum. A float switch arrangement is mounted in the reservoir to shut off the heater and water inflow upon filling of the reservoir. Also disclosed is an overflow passage, allowing overflow to be routed to a drain.