SQE 3" multistage smart submersible pump intended for domestic water supply, irrigation and environmental applications. The pump has soft start and stop and protection against dry run, overvoltage, undervoltage, overload and overheating. The motor is a single-phase permanent magnet rotor type motor that ensures optimal efficiency over a wide load range. The pump is controlled using the SQE constant pressure controller CU301 or a conventional pressure switch.