Abstract: An integral water purification system including a tank for containing unclean water located at the source with continual replenishment of said water in the tank, a cover for the tank to accumulate natural heat by the elimination of any disturbances by the elements and to aid such accumulation by the rays of the sun in order to vaporize the unclean water, a blower for moving the vapor to a pipe leading from an area of one temperature to an area of another and lower temperature such as from the crest to the depth of the sea, whereby the vapor is condensed into droplets and accumulated in a condensing unit as pure water and a pump to force the water from the final condenser to a fresh water storage tank for later use whereby potable water is obtained from unclean water with the use of natural forces and with a minimum of expenditure of artificial energy sources.