What type of valve is also known as a ground key?

A ground key is commonly associated with a stop valve, which is used to control the flow of liquids or gases in piping systems. The term "ground key" refers to the mechanism by which these valves can be operated, often requiring a special key to open or close the valve. This ensures security and prevents unauthorized access to the valve, which is particularly important in systems where controlling flow is critical for safety or operational reasons.

Stop valves are designed to fully stop the flow of fluid, making them essential in plumbing for isolating sections of a system for maintenance or emergencies. Their straightforward operation—an open or closed position—allows for rapid response in managing flow control. This functionality aligns with the practical applications of stop valves in various plumbing settings, particularly in infrastructures where safety and control are paramount.

Considering the other types of valves, a shut-off valve generally refers to a broad category of valves that includes stop valves and is primarily focused on stopping the flow. A compression valve facilitates sealing between pipes but is not typically referred to as a ground key. A ball valve, while effective at providing a tight seal and controlling flow, does not usually operate with the traditional ground key mechanism associated specifically with stop valves.