Control the water/gas supply using the Wally Shutoff Valve. Leaks have notoriously bad timing, let the Wally Shutoff Valve be there when you can't be. The Shutoff Valve closes automatically† when a leak is detected by Wally Sensors. Shutoff Valve works with water or gas*. Shutoff Valve is battery operated ensuring easy placement and installation. Works when power and internet is down**.