Fully automatic submersible pumps with large support base designed to increase stability and the possibility of operation also in positions not perfectly perpendicular to the soil. Suitable for winter use on top of swimming pool covers, to remove rain water and prevent the cover from breaking due to the heavy weight of the accumulated water. Pump in resistant thermoplastic material. Stainless steel motor, shaft, bolts and screws. Threefold seal with interposed rings with oil pre-chamber. Built-in float for automatic operation. Submersible, asynchronous, continuous service. Stator inside a stainless steel enclosure, covered by wiring cover and capacitor.