What is one function of a valve in a water distribution system?

Valves play a crucial role in water distribution systems primarily by controlling the flow and pressure of water. They allow operators to manage the amount of water that passes through pipes and can be used to stop or start the flow, redirect it, or maintain desired pressure levels within the system. By regulating flow, valves help prevent issues such as pipe bursts caused by excessive pressure and ensure that water is distributed efficiently to various points of demand.

The other functions listed do not pertain to the primary role of valves in a water distribution system. For instance, increasing water temperature is not something a valve does; rather, it involves heating mechanisms. Filtering contaminants is a task typically handled by water treatment facilities or specialized filter systems, not by valves. Storing excess water is managed through reservoirs or tanks, which serve storage functions rather than flow control. Thus, controlling flow and pressure accurately describes the essential function of valves in this context.