The LW type non clogging vertical sewage pump is a new generation of pump products developed based on the introduction of advanced technologies at home and abroad, combined with the characteristics of domestic water pump usage. It has significant energy-saving effects, anti winding, and non clogging features. It has a unique effect in discharging solid grains and long fiber waste. This series of pumps adopts a unique impeller structure and a new type of mechanical seal, which can effectively transport media containing solid matter and long fibers. Compared with traditional impellers, the impeller of this pump adopts a single channel or double channel form, which is similar to a bent pipe with the same cross-sectional size and has very good flow capacity. Coupled with a reasonable chamber, the pump has high efficiency. The impeller has undergone balance testing, making the pump operate without vibration. The hydraulic performance of this pump is advanced and mature. After testing, all p