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Only when the water in the water pipe reaches a certain level, the water will flow out of the faucet. Many people won’t care about whether there flwo any water drops out after washing hands.Turn on the tap,water will flow into the water in the tube,Water will maintain a certain level.Then the water will flow out for users.Even if the tap is not fully closed,Water pressure is not enough to make water out.Water continuously flows into the water pipe for the next user.The capacity of the water storage pipe is designed according to people’s water consumption at each time.Water conservation is the responsibility of everyone .