The picture illustrates how water is filtered through different stages. Overall, the process mainly contains two stages: putting dirty water into a special container and taking the clean water from the next filter container. The process requires specific equipment, including a plastic lid, a plastic barrel, a storage drum, and a connecting tube.
Firstly, dirty water is poured into the first container, which has a plastic lid and barrel. This container should be placed above the storage drum. As the water filters through, it passes through different substances: gravel at the bottom, charcoal in the middle, and sand on the top. The gravel removes larger particles, the charcoal absorbs impurities and odors, and the sand filters out finer sediments.
Next, the filtered water flows through a narrow tube connected to the next container, which is the storage drum. In this drum, the fluid is collected and can be accessed through an outlet tap, resulting in clean water ready for drinking.