The given illustration depicts the process of extracting clean water from dirty water. For the most part, there are three major stages: aptly named adding, filtering water, and acquiring end product.
The first stage begins with the removal of the lid of a plastic barrel that would later be used for the refining system. Specifically, the top cover is lifted out, and unprocessed water is poured into a cylinder-shaped plastic tub.
In the second stop, water would be absorbed by a thick layer of sand. The charcoal layer is embedded in the radille of the three-layer structure, while the gravel one plays the role of the final. Filtered water that once reaches the bottom of the drum would be transferred to the less elevated storage drum through a pipe.
To wrap the process up, purified water is then stored in a lower storage drum with a closed lid. A tap on the faucet of the underpart of the barrel allows user to exploit the washed drinking water.