Valve Screamer Whole House Wireless Automatic Motorized Ball Valve (1 inch) Wireless shut off valve protects against water damage, 1" female NPT Install automatic shut off valve directly on the main line to control water flow to the premises Comes with 2 wireless water alarm sensors that will detect moisture when placed in strategic locations Recommended locations for water alarm sensors are under sinks, behind toilets, by water filtration systems and ice makers. If there is a water line and connection then you need a water alarm sensor Has normally open and closed outputs built-in for wiring into a home alarms system