The shut-off valve is your best protection against costly water damage if and when pipes burst or major leaks occur. Shut-off valves are usually found where the service line enters the house or business. Although this location varies depending upon when your home or business was built. Normally the shut off valve is located where a hose bib is also found, usually near the front of a home. Make sure everyone in your household or business knows EXACTLY where the shut-off valve is, and how to use it. Any plumbing problem can result in severe water damage in a short period of time. At times like this, the shut-off valve is invaluable.