The answer to 'types of shut-off valve' is that there are several common types of shut-off valves used in plumbing systems, each with its own advantages and applications. The most common types include ball valves, gate valves, globe valves, and angle stop valves.
Ball valves are one of the most popular shut-off valve types. They feature a spherical ball with a hole that rotates to open and close the valve. Ball valves are known for their reliable, leak-proof performance and ease of use. Gate valves use a sliding gate mechanism to open and close the valve, and are often used for larger pipe sizes. Globe valves have a circular disc that sits in a valve body, providing a more gradual flow control. Angle stop valves are commonly used to control the water supply to individual fixtures like sinks and toilets.