GRUNDFOS Unilift AP12.50.11.A1 submersible drainage pump. Vertical single-stage stainless steel submersible pump with vertical discharge nozzle and submersible 1-phase electric motor, with integrated thermal protection, insulation class F. The pump is equipped with a filter in the base and a float switch for automatic switching on and off. The impeller is semi-open. Pump for pumping domestic and industrial wastewater, rainwater, in the presence of solid particles up to 12 mm in size. The pump has a double sealing system with a mechanical seal and an oil seal chamber with non-toxic oil. The pump has a vertical discharge pipe and a motor cooling casing, which is constantly washed by the working fluid. Rolling bearings with long-term lubrication are maintenance-free. The pump is ready for installation, has a carrying handle and is supplied with a 5 m power cable. The power cable has a plug-in electrical connector and covered wire contacts to prevent moisture from entering the stator windings.