What type of valve is commonly used to control flow in a water distribution system?

A ball valve is commonly used to control flow in a water distribution system due to its design and functionality. Ball valves feature a spherical disc, or "ball," which can be rotated within the valve to either allow or obstruct flow. When the ball's hole is aligned with the flow direction, the valve is open, and when it is perpendicular, the valve is closed. This provides a straightforward and reliable method of flow control.

One of the key advantages of ball valves is their ability to provide a tight seal, minimizing leakage when closed. Additionally, they can handle a wide range of pressures and flow rates, making them suitable for various applications within water distribution systems. Their ease of operation, requiring just a quarter turn to open or close, further enhances their popularity and efficiency in managing water flow.

Other valve types, while useful in specific situations, do not match the versatility or effectiveness of ball valves for flow control in general water distribution contexts.