一The diagram below shows how a water tower works.
Summarise the information by selecting and reporting the main features and make comparisons where relevant.
A water tower consists of a large tank (D), which contains water and which is raised high enough above ground to provide the necessary level of water pressure for a community. The tank is connected to the water system's primary feeder pipes (C) by a vertical pipe. Drinking water for a town is first treated in a water treatment plant ( ...