A Sewage Submersible Dewatering Pump (or sub pump, Electric Submersible Pump) is a device which has a hermetically sealed motor close-coupled to the pump body. The whole assembly is submerged in the fluid to be pumped. The main advantage of this type of pump is that it prevents pump cavitation, a problem associated with a high elevation difference between pump and the fluid surface.

Sewage Submersible Dewatering Pump push fluid to the surface as opposed to jet pumps having to pull fluids. Submersibles are more efficient than jet pumps

Sewage Submersible Dewatering Pumps are used in applications, including sewage treatment plants, seawater handling, groundwater pumping, fire fighting (since it is flame retardant cable), borehole drilling and pumping, water well and deep well drilling, offshore drilling rigs, artificial lifts, mine dewatering, irrigation systems, and water supply systems.