Jet
pumps are another type of pump used for drawing water
from a well. Jet well pumps work under the principle
of pumping water under high-pressure through an ejector
and into a discharge pipe that comes up from the well.
When the jet of water under high-pressure is forced
through the discharge pipe, a vacuum is created that
causes the water to be drawn from the well. At surface
level, some of the water is pumped into the plumbing
of a building while some is rerouted back to the ejector
for the purpose of raising additional water from the
well. Due to the difference in operation procedures,
jet well pumps use more electricity than submersible
well pumps. Manufacturers of jet well pumps produce
three different types, including shallow well jet pumps,
deep well jet pumps, and water well jet pumps.
Shallow
well jet pumps are used in about thirty-two percent
of homes in the United States. As the name of the shallow
well jet pump implies, these well pumps are not effective
at any depth below 25 feet. With a shallow well jet
pump, the motor and pump are not located within the
well itself. Typically they are located close to the
well in some type of basement or utility room. The main
advantage of shallow well jet pumps is that they can
be used in a well with a narrow diameter since they
have no working parts down inside of the well.
Deep
well jet pumps are used in about eight percent of homes
in the United States. They are similar to shallow well
jet pumps but the ejector portion of this pump is installed
down in the well, rather than being attached to the
well pump itself. Deep well jet pumps are able to pull
water from depths of about 75 feet.
In
some instances, you might be able to purchase a convertible
jet well pump, which means that it can be used for either
shallow or deep well applications. The use of a convertible
jet well pump depends on how the pump contractor installs
the ejector of the pump. Choosing the correct type of
jet pump for your needs is not a job for a beginner.
The correct type of pump selected for your well and
water needs should last you for years without replacement.