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Return to the Sump Pump main page.
Simply described, a sump pump
consists of
a centrifugal pump driven by
an electric
drive motor. Since the pump portion
has to
be submerged in the water at
the bottom of
the sump pit, the two major types
of sump
pumps differ primarily in where
they position
the motor. Submersible models
integrate the
motor with the pump, sealed inside
a watertight
compartment with waterproof electrical
cords
that run out of the water to
hook up to a
nearby power outlet. Pedestal
models mount
the motor (and all other electrical
components)
on a pedestal, high and dry above
the sump
pit, and use a vertical drive
shaft to link
to the pump that is built into
the base of
the pedestal. The pedestal style
is more
traditional, predating the advances
in design
and material that now allow electrical
appliances
to be placed safely underwater.
They are
typically less expensive (since
no waterproof
housing is needed), but the exposed
motor
means that the unit is a bit
noisier—and
the unsightly motor is certainly
a negative
when trying to dress up the appearance
of
a sump pit in a nicely finished
basement.
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