A Sump pump is used to transfer liquid accumulated below the surface of its end destination. Sump pumps sit inside of a chamber or holding tank and their sizes and capacities vary depending on their demand. There are two types of sump pumps and they are: pedestal and submersible.
The pedestal type of sump pump is made so that the motor used to drive the pump is located above the pump itself which makes maintenance on the motor far easier. The submersible sump pump is all located in the one spot (pump and motor) all located at low level submerged in liquid, the electrical components which control these pumps all need to specially sealed to avoid faults as they are constantly submerged in liquid.