The diagram illustrates a method that transforms dirty water into clean water.
Overall, there are four stages in this process, beginning with pouring contaminated water into a plastic barrel and ending with clean water.
The first stage, the drum and barrel are placed to each other and that the top of the barrel is higher than the drum. These instruments connect each other by a pipe that runs from the bottom of the barrel into the drum. The next steps, sand, charcoal and grave are put in the barrel to form a complete filter.
The process concludes with water being poured into the barrel and filtered through the steps and then into clean water to drink