Put the sensor on the floor near the hot water tank, set the activator on the input valve, plug the device and that's it. In case of thank leak, alarm will be on and the activator will close the water valve. The item "Water heater leak detector electric shutoff valve" is in sale since Monday, February 8, 2016. This item is in the category "Home & Garden\Home Improvement\Home Security\Sensors & Motion Detectors". The seller is "jean-claude49" and is located in Granby, Quebec. This item can be shipped to Canada, United States.