A submersible pump is a device with a hermetically sealed motor capable of being submerged completely in the fluid to be pumped. When the switch is turned on, impellers start turning sucking the liquid into the pump and then push the liquid up through the pipe to a tank or disposal area. The process continues until it is switched off.
Submersible pumps actually push liquid through the pipes rather than a jet pump that sucks or pulls the liquid through a pipe. Submersible pumps are more efficient than jet pumps and are capable of pushing water a long distance depending on the horsepower of the motor.
Submersible pumps are found in many applications. Single stage pumps are used for drainage, sewage pumping, general industrial pumping and slurry pumping. They are also popular with pond filters.
Multiple stage submersible pumps are typically lowered down a drilled hole and most typically used for residential, commercial, municipal and industrial water extraction and oil wells.
Other uses for submersible pumps include sewage treatment plants, seawater handling, fire fighting (due to its flame retardant cable), deep well drilling, offshore drilling, artificial lifts, mine dewatering and irrigation systems.
Special attention to the type of submersible pump is required when using certain types of liquids. Pumps used for combustible liquids or for water that may be contaminated with combustible liquids must be designed not to ignite the liquid or vapors.
A certified contractor can help you decide what type of pump you need – for pumping power, energy efficiency, safety, materials and budget.