Sewage strain pumps with external movement from the ground’s surface. The pump is submerged in the liquid and the movement is transmitted with the shaft from the motor to the pump. This set-up achieves the easy suction of the pump and the protection of the motor from humidity and overheats. It is constructed with mouth dimensions 2”-2 ½”-3” and with an output proportional to its request. It can be used for pits and waste and it is suitable for underground use, for the aquatic horizon’s stabilization with smooth operation. The motor is connected through an elastic link - cobbler- for a starting without vibrations and the shaft is arranged on bearings and rings depending on the structure, liquid and temperature.