The diagram depicts the process of recycling rainwater for use in houses.
Overall, the recycling process has three main stages: collecting rainwater, treating it, and pumping it to houses for use. This system takes place both above and below ground through mechanical steps.
On the surface, the row of houses is built with roofs that collect rainwater, water pipes between the buildings, and two downspouts on both ends of the row of houses, which connect to the underground pipe. When it rains, water is absorbed into the roofs and flows to the underground pipe through the two vertical pipes. Additionally, pipes between the houses keep each home’s water level balanced.
With regards to the underground components, collected water in the underground pipes will pour into water storage tanks after passing through a water filter, where collected water is purified to eliminate substances and dirt. Depending on the water level, the filtered water flows through a pipe to another storage, where chemicals decontaminate this water to become potable. After that, treated water is piped to the surface pump house located at one end of the line of houses, where recycled water is pumped into the homes for daily activities via plumbing connecting the houses. This process repeats whenever raining.