排水系统采用特殊单立管排水系统，和传统排水系统相比有安装方便、排水性能好等优点。

Drainage system USES single stack drainage systems, drainage systems and traditional compared with easy installation, good drainage performance advantages.

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WAB型单立管排水系统属于管件特殊类单立管排水系统，在国内已广泛地应用于工程实际。

WAB single riser drainage system is a special kind of single stand pipe drainage system which has been widely used in engineering practice in our country.

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