The picture diagram illustrates the simple water filteration system.
Overall, there are two main containers, one is plastic barrel used to store water for cleanliness and second is storage drum it stores filterized water.
According to the diagram, initially, water is poured into the plastic barrel. Water passed from three material layers: top is sand, middle is charcoal and bottom layer is gravel. As the water passed downward, it first pass through sand layer and then charcoal layers and finally from gravel in order to remove its all impurities and solid particle.
After cleaning water, it store through a pipe into storage drum for consumption. A tap is fixed at the bottum part of the drum. This tap is used to access of water in glass for drinking.
In summary, an easy method is used to purify the polluted water into usable water, just by using simple three materials and two drums.