Which type of valve is typically used to shut off the water supply?

The ball valve is a commonly used valve for shutting off the water supply due to its simple design and effective operation. It consists of a sphere-shaped closing mechanism that fits perfectly within the valve body. When the valve is turned to the open position, the opening allows water to flow freely. Conversely, when the valve is rotated to the closed position, the solid part of the sphere blocks the flow of water, providing a reliable seal.

One key advantage of ball valves is their ability to provide a tight seal with minimal resistance, which makes them suitable for a variety of applications, including residential and industrial settings. They also require only a quarter turn to fully open or close, making them easy to operate.

While other valves serve specific functions, such as preventing backflow (check valves) or controlling flow rates (gate and butterfly valves), the ball valve is most recognized for its primary role in securely shutting off the water supply when necessary. This functionality is critical for maintenance and emergency situations, ensuring that water supply can be controlled effectively.