A sewage pump is a pump that is integrated with a motor and operates submerged in liquid. Compared to general horizontal or vertical sewage pumps, it features a compact structure and occupies less space. Installation and maintenance are convenient, as large sewage pumps typically come with an automatic coupling device for easy installation and repair. They can run continuously for long periods. Due to the same shaft for both the pump and motor, the shaft is short and the rotating parts are lightweight, resulting in a relatively smaller load on the bearings (radial) and a much longer lifespan than standard pumps. There is no cavitation damage or issues with filling and draining water. This last point greatly facilitates operators. They produce minimal vibration and noise, have low motor temperature rise, and are environmentally friendly.