What is the primary benefit of using a ball valve in plumbing?

Ball valves are favored in plumbing systems primarily due to their high flow capacity and the ability to create a tight seal when closed. The design of a ball valve features a spherical disc that rotates to either block or allow fluid flow. This design allows for minimal flow resistance when the valve is fully open, resulting in a high flow capacity compared to other types of valves. Additionally, when the valve is closed, the smooth surface of the ball against the valve seat ensures a very effective seal, preventing leaks.

This combination of features makes ball valves ideal for applications where quick shut-off and efficient flow are crucial. While other factors such as cost, weight, and corrosion resistance may play roles in valve selection, the distinctive operational advantages of ball valves stand out in terms of flow efficiency and reliability in maintaining a leak-proof seal.