Submersible pumps suitable for draining rainwater, ground water, sandy construction site water and generally for all types of non aggressive waste waters. The pump body, impeller, motor flange, filter, disc, motor casing, casing with handle and cable compartment cover are made of AISI 304 stainless steel. They have an insulating rubber-coated handle and an AISI 316 stainless steel motor shaft. Drenag pumps have a double mechanical seal with interposed oil chamber (non-toxic oil) in carbon/alumina on the motor side, and silicon silicon/carbon on the pump side. The motor is dry-running, asynchronous, sealed and cooled by the pumped liquid. The rotor is mounted on sealed permanently lubricated ball bearings, oversized and selected for quiet operation and durability. They have thermo-overload protection as standard and a permanently connected capacitor in the single-phase version. The single-phase version can be supplied with float for automatic operation. Power input cable with Schuko plug for the single-phase version. The maximum ambient temperature for using Drenag is +40°C with the motor above water.