The answer to 'lifespan of shut-off valve' is that a well-maintained shut-off valve can typically last 20-50 years or more. Shut-off valves are critical components in a home's plumbing system, allowing you to turn off the water supply to a specific fixture or the entire house in case of a leak or other emergency. The actual lifespan of a shut-off valve depends on factors like the quality of the valve, how often it's used, and the water pressure and mineral content in your home's water supply.
Shut-off valves made of brass or stainless steel tend to last longer than valves made of cheaper materials like plastic. Valves that are rarely used are less prone to wear and tear than ones that are frequently operated. Homes with hard water or high water pressure may see their shut-off valves wear out more quickly. With proper maintenance, such as regularly testing and lubricating the valve, you can maximize its lifespan and avoid the need for costly replacement.