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Centrifugal ( out of pond)  pumps can be installed either above or below the water surface.  Pumps that are not self primming will need to be installed below the water surface in a waterproof box or above the surface using a check valve to hold prime on the pump if the power goes out.  Centrifugal pumps use high efficiency motors and cost more initally but will recover the purchase cost with energy savings.

The following formula can be used to determine the operating cost of any electrical motor; amps x volts x hours per day of opertion

1000 x cost per kilowatt hour (.09 cents national average)

Tips for operating an external pump:

Proper plumbing and set up is very improtant when chosing an use of external pumps. Below are some ways to set up a external pump with a skimmer.  There are limits to how high a pump can be placed in a suction lift set up. Each pump is different, but these layouts show how most pumps can be installed. There a two basic setups with an external pump.  Flooded suction and Suction Lift.

Flooded Suction                                                         Suction Lift


A flooded suction is below water level        Suction lift is above water level


Improper Plumbing Setup



Never Cteate a high spot between the pump and the skimmer/pond, it will cteate an airlock in the suction line and the system will not work properly

Pumps /External




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Pricing Subject to change without notice,  We try to keep pricing on the site current but changes from our suppliers happen througout the season and are beyond our control.

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