The answer to 'which is better shut-off valve or' is that shut-off valves are generally better than faucets for controlling water flow in a plumbing system. Shut-off valves provide a more reliable and secure way to stop the flow of water, which is essential for tasks like repairing leaks, replacing fixtures, or shutting off water in an emergency.
Shut-off valves are installed inline with the water supply pipes, usually near each fixture or appliance. They allow you to isolate the water supply to a specific area, rather than having to shut off the main water supply for the entire home. This makes it easier to perform plumbing repairs and maintenance without disrupting water access in other parts of the house.