The answer to 'shut-off valve or shut-off valve' is that they are the same thing - a shut-off valve is a plumbing component used to control the flow of water in a residential or commercial plumbing system. Shut-off valves are essential for isolating and turning off the water supply to specific fixtures or the entire building in case of a leak, pipe burst, or for maintenance.
Shut-off valves are typically located near water heaters, toilets, sinks, and other plumbing fixtures. They allow you to quickly shut off the water supply to that specific area, rather than having to turn off the main water supply for the entire home or building. This can save a significant amount of water and prevent further damage in the event of a plumbing emergency.