The sewage pump is used for draining pits and deep roadway underpasses, as well as for de-watering basements and courtyards subject to a flooding risk or groundwater. It is usually started automatically via float switches. The advanced V(WQ) series, a branch of single phase drainage pump, will be your ideal drainage helper. The letter "V" which substitutes for the letters "WQ" indicates the distinct design of the filter and the broadness of the high efficient area. It can work safety and efficiently at high flux with the feature of complete heads. The large tunnel in the design aids in the conveyance of long fiber fluids or solids with varying diameters. The selection of bottom suction structure, stainless steel and special cast iron make the pump have the capabilities of complete drain and high resistance of abrasion and corrosion. The float switch can automatically control on and off with the change of the liquid level. The protector in the motor can automatically cut off the power when it is overheated, thus guarantee the security and reliability of pump's run even in the atrocious environment.