- The Megahome countertop water distiller produces up to 4 gallons of pure steam distilled water a day. This house water distiller produces one gallon of distilled water every five.five hours. The unit comes total with a white enamel water distiller, a one gallon glass collection bottle, six charcoal filters, and residue cleaner.&nbspUsing this house water distiller will make sure a constant supply of contaminant free water with a pleasant taste.