Detects water leaks that may occur due to pipe breaks in walls and ceilings* Sends a shut-off signal to the main water valve when a leak or abnormal flow is detected** Ability to monitor your water consumption through consumption graphs in Neviweb * The flow sensor detects abnormal flows of 2L/min (¾ inch version) and 4L/min (1 inch version). ** The tolerance for abnormal flow before alerting or closing the valve is at least 15 minutes.