A solar still consist of shallow triangular basin made up of Fiber Reinforced Plastic (FRP). Bottom of the basin is painted black  so as  to absorb solar heat effectively. Top of the basin is  covered with transparent glass tilt fitted so that maximum solar radiation can be transmitted in to the still. Ages of the glass are sealed with the basin using tar tape so that the entire basin becomes air tight. Entire assembly is placed on a structure  made of MS angle. Out let is connected with  a  storage container.  Provision  has been made to fill water  in  the  still basin.  A window is provided in the basin to clean the basin  from inside. Water is charged in to the basin in a thin layer.

Solar Stills have got major advantages over other conventional Distillation / water purification /de-mineralisation   systems    as follows :  

1. Produces pure  water  
2. No prime movers required
3. No conventional energy required
4. No skilled operator required
5. Local manufacturing/repairing
6. Low investment
7. Can purify highly saline water (even sea water)

Solar  stills  is an useful devise to get fresh/  distilled  water which is required in