A 3/4″ drain valve is a type of valve that is used to control the flow of water in a plumbing system. It is typically used to drain water from a pipe or fixture.
Ball valves are the most common type of drain valve. They are easy to operate and provide a good seal when closed. Ball valves are also relatively inexpensive.
Gate valves are less common than ball valves, but they can be used in applications where a more robust seal is required. Gate valves are also more difficult to operate than ball valves.
Butterfly valves are the least common type of drain valve, but they are becoming more popular due to their low cost and ease of installation. Butterfly valves can be used in applications where a large volume of water needs to be drained quickly.