If the leak indicator is flashing or continuously on, it is indicative that a possible leak can exist. Below is a list of possible causes of leak indicators..
Outside faucet, garden or sprinkler system leaking.
Toilet valve not sealed properly, or toilet running.
Faucet in kitchen or bathrooms leaking.
Appliances leaking (ice maker, washing machine, dishwasher, or water cooled air conditioner or heat pump.
Soaker hose in use.
Leak between the water meter and the house.
Hot water heater leaking.
Watering yard for a long period of time.
Filling a swimming pool.
Any continuous use of water for 24 hours.