Which type of valve is most commonly used to control water flow?

The ball valve is the most commonly used type of valve to control water flow due to its design, which allows for easy operation and a reliable seal. Ball valves feature a spherical disc (the ball) with a hole through the middle that can rotate to either allow flow or block it entirely. This mechanism provides a tight seal when closed, significantly reducing the risk of leaks.

Additionally, ball valves have a simple quarter-turn operation, making them user-friendly and efficient for quick shut-off applications. They are versatile and can handle a variety of fluids, which contributes to their widespread usage in plumbing systems. Their durability and capacity to withstand high pressures make them suitable for both residential and industrial applications, enhancing their appeal as the preferred choice for controlling water flow.