The answer to 'how does shut-off valve work' is that a shut-off valve is a valve used to control the flow of water in a plumbing system. It is typically installed near the main water supply line or individual fixtures like sinks, toilets, and washing machines. When turned, the valve closes off the water flow, allowing you to shut off the water to that specific area for repairs or maintenance without disrupting the entire home's water supply.
Shut-off valves come in a variety of types, including gate valves, ball valves, and globe valves. Gate valves use a sliding gate to block water flow, while ball valves use a rotating ball with a hole through the center to open and close the valve. Globe valves use a disc that presses against a valve seat to control the water flow. Proper maintenance and operation of shut-off valves is important to ensure they function properly when needed.