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The “Branching Plug” can help to treat the water in the sink differently.The “Branching plug” can handle clean water, dirty water and almost clean water differently. The dirty water is piped out through the middle outlet directly, because it can not be reused. The clean water is let out through the left part to the recycle pipe or storage box. And the almost clean water is lead through the right one to flush toilet bout or clean mop. The “Branching Plug” would save water and decrease waste by classifying water.