Top Sensor The Top Sensor detects the first few drops of a leak. Use the Top Sensor if you can access the area directly underneath potential leaks. The rear cutout of the Leak Detector lets you place the sensor directly next to a wall even with quarter-round molding. Examples of uses include underneath toilet valves, sink drains, or water inlet hoses. Bottom Sensors The Bottom Sensors detect leaks after the water reaches the ground and starts to spread.
