How does the Leak Defense System differentiate between water flow caused by regular water usage and water flow caused by a leak?

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The Leak Defense System has many features that can easily be customized to meet the needs of an individual household. The most basic features are called the HOME and AWAY modes. To customize these features, the homeowner simply tells the system what is an allowable flow level for a designated length of time while they are home and another for when they are away.