This submersible pump is a multi-stage, speed-regulated device designed for raw water supply, groundwater lowering, and pressure boosting. It is constructed entirely of stainless steel DIN W.-Nr. EN 1.4301 and can be installed both horizontally and vertically. The pump handles clean, thin, non-aggressive liquids without solid particles or fibers and includes a built-in non-return valve. It requires a three-phase synchronous high-efficiency permanent magnet motor with a frequency drive to operate efficiently at 3600 rpm in applications such as water treatment fertigation, chemigation, dosing, digital groundwater management, and various irrigation methods.