Firstly submersible pumps are a device to be fully submerge in the liquid it is pumping. It’s typically used for water removal, such as in sump pumps for flooded basements or for irrigation and drainage applications. These pumps are known for their efficiency and reliability due to their hermetically sealed motor and close-coupled design, which prevents the need for priming. 

Function:

Submersible pumps work by converting rotary energy into kinetic energy to push fluids upwards. They are designed to be submerged in the liquid, which allows them to be self-priming. Meaning they don’t require a suction pipe or manual priming before use.