The backflow preventer must be supported and is not designed to carry full weight of the stand pipe.
防回流阀必须有所支撑， 不能用于承载立管的全部重量。
The lower part of the water outlet device is a stand pipe, and the stand pipe is connected with the flared mouth as an integrity.
漏水器下部为一竖管，竖管和喇叭口相连并形成一个整体。
Clean devices which cannot stand washing and the pipe section which may have dirt and sundries left after washing such as filters or dirt separators.
对不能经受冲洗的设备和冲洗后可能存留脏物、杂物的管道段，如过滤器及除污器等，要进行清理。
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