The WQ type submersible motor pumps are suitable for handing dirty water, sewage, refluent water, water mixed mud, liquids containing air or gas, as well as treated and putrid mud. The WQ pumps are particularly suitable for installing in sewers galleries, excavation sites, wells, channels underground car parks, etc. The pump which fitted with a liquid vortex open impeller situated in a large circular ring chamber, enclose between the pump, body and the baseplate, this baseplate prevents solid particles exceeding 20mm from entering the pump. The rotation of the impeller generates a liquid vortex within the pump body and it is this cortex that draw liquid into the pump. Providing it with kinetic energy, and directing it out of the delivery opening. These pumps are extremely reliable for continuous use and the motor is designed for maintenance free. Recommended of usage in cellars, underground car parks, drains, cesspits, etc 。