This advanced V(WQ) series, a branch of single-phase and three-phase drainage pumps, will be your ideal drainage helper. The letter"V" which substitutes for the letter"WQ" indicates the distinct design of the filter and the broadness of the high efficient area. It can work safely and efficiently at high flux with the feature of complete heads. The design is designed to a wide tunnel which helps to convey the long fiber liquid or the solid whose diameter is about 35mm. The selection of bottom suction structure, stainless steel and special cast iron made the pump has 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 overheated or overcurrented thus guarantee the security and reliability of pump's run even in the poor environment.