It is exactly what it sounds like-a water pump that you put in your well under water. It pumps the water into the house directly from the well, and uses the water as a coolant. Usually they are about 18-24 inches long, about 3-5 inches around, and weight about 40 pounds; and cost a small fortune (if you ask me anyway). Depending upon who you ask they are also the most efficient way to get the water from your well to the house, and do not need anywhere near as much servicing as above ground or in-house pump. Ask your local pump dealer which pump is best for you and the needs of your household-they should be able to give you several to choose from.
A submersible slides down into a 4 inch or larger well. It is dropped down below the water level so it pushes the water up the pipe. The other way is to have a pump on top of the well pipe. Submersibles are far more dependable and pump a larger volume of water.
lets break it down... submersible- able to be put underwater... well- deep hole that water comes from... pump- sucks the water...
