Sewage pump is a pump and motor connected, and at the same time diving under the liquid pump products, sewage pump structure is compact, small footprint. Easy installation and maintenance, large sewage pumps are generally equipped with automatic coupling device can be automatically installed, installation and maintenance is quite convenient. Long continuous operation time. Because the pump and motor are coaxial, the shaft is short, and the rotating parts are light, the load on the bearing is relatively small, and the life of the pump is much longer than that of the general pump. In this article, we introduce four types of sewage pumps.