排污泵是一种泵与电机连体，并同时潜入液下工作的泵类产品，与一般卧式泵或立式污水泵相比，排污泵结构紧凑、占地面积小。安装维修方便，大型的排污泵一般都配有自动藕合装置可以进行自动安装，安装及维修相当方便。连续运转时间长。排污泵由于泵和电机同轴，轴短，转动部件重量轻，因此轴承上承受的载荷（径向）相对较小，寿命比一般泵要长得多。不存在汽蚀破坏及灌引水等问题。特别是后一点给操作人员带来了很大的方便。振动噪声小，电机温升低，对环境无污染。
The sewage pump is a kind of pump product which is connected with the motor and works under the liquid at the same time. Compared with the general horizontal or vertical sewage pump, the sewage pump has compact structure and occupies a small area. Installation and maintenance are convenient. Large sewage pumps are usually equipped with automatic coupling device for automatic installation. Installation and maintenance are quite convenient. Continuous operation for a long time. Because the pump and motor are coaxial, the shaft is short and the rotating parts are light, the load (radial) on the bearing is relatively small, and the service life of the sewage pump is much longer than that of the general pump. There are no problems such as cavitation damage and irrigation. In particular, the latter point has brought great convenience to operators. Low vibration and noise, low temperature rise of motor and no pollution to environment.