The illustration demonstrates the structure and working process of a basic water filtration system used to manufacture safe-to-drink water. Overall, the setup consists of two containers, each playing a distinct role in eliminating impurities from the water through multiple filtering materials before being stored for consumption.
Initially, dirty water is poured into the top of a plastic barrel. It subsequently passes through three sequential filters: the top filter contains sand, the middle filter comprises charcoal, and the bottom one is made of gravel. This multi-stage filtering process effectively cleans the water, making it ready for use.
Following filtration, the purified water is transferred to another storage drum. A pipe connects the barrel to the drum, with one end positioned in the gravel layer of the barrel. This pipe facilitates the transfer of the filtered water into the storage drum. Finally, a tap located at the bottom of the container can be opened to allow clean water to be collected for drinking purposes.