31.72 Fresh water from the sea (Sunwater Company solar stills installations). This 10 g.p.d. SUNWATER solar still is on the roof of the motel at the fishing resort of Puertecitos, Baja California, Mexico. For years prior to this installation, all fresh water used here had been hauled at least 200 miles by land, sea or air. Such an installation would pay for itself in one to two years.