The answer to 'shut-off valve replacement frequency' is that most shut-off valves should be replaced every 5-10 years, or whenever they show signs of wear or damage. Shut-off valves are critical safety devices that control the flow of water into your home, so it's important to keep them in good working order.
Over time, the internal components of shut-off valves can become corroded, stuck, or leaky. Replacing them proactively helps prevent unexpected water leaks and water damage. If your shut-off valve is difficult to turn, dripping, or not fully closing, it's a good sign that it needs to be replaced.