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Rainwater collection system:
(1) The roofs surface collects the rainfall. (2) The gutter and pipes distribute the rainwater. (3) A valve is used to regulate in-flow of water to avoid overfilling the tank. (4) A tank stores rainwater for later use. (5) A valve is used to regulate out-flow of water to avoid emptying the tank completely. (6) A sprinkler can consume water from the tank as needed.