The non-revenue water costs are significant to water utilities and the flushing of water distribution systems makes up for a large portion of this expense. One utility saved millions of gallons of water with a n automa ted flushing unit.

中文翻译：

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自动冲洗节省了水

无收益水成本对自来水公司来说是巨大的，冲洗配水系统弥补了大部分费用。一家公用事业公司使用自动冲洗装置节省了数百万加仑的水。