What type of valve is primarily used to stop the flow of water in a plumbing system?

A gate valve is primarily used to stop the flow of water in a plumbing system. This type of valve operates by raising or lowering a gate within the valve body. When the gate is fully lowered, it creates a complete seal, effectively stopping the flow of water. Gate valves are designed for minimal pressure drop across the valve when it is fully open, making them ideal for isolation purposes.

In contrast, other types of valves serve distinct functions. For example, ball valves are known for their efficient shut-off capabilities and quick operation, but they offer a different mechanism and are often used in applications where fast opening and closing are necessary. Check valves are used to prevent backflow and ensure that fluid flows in one direction, while globe valves are typically used for throttling flow rather than complete isolation. Understanding the specific application and functionality of each type of valve is crucial for effective plumbing design and maintenance.