The Leak Defense System is the best and most effective plumbing water leak detector, and water leak detection system on the market for the whole house or business, featuring an automatic water shut-off valve. Point-of-Leak-Detectors catch leaks everywhere you can't see, including behind walls and in ceilings, then wirelessly alert you via your mobile device with an easy to use control panel and app for remote management. Many insurers offer incentive programs to policyholders who have the Leak Defense System installed in their home. The automatic water shut-off control valve is installed on the structure's incoming waterline and, once installed, it monitors water flow into the house for excessive flows indicating a potential leak.