How to Wire WhisperFlo and Similar Pumps For 115V


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Like most pumps, the Pentair WhisperFlo pump is shipped from the factory wired for 230V. This guide shows you how to change a WhisperFlo pump and other similar pumps from a 230V to a 115V configuration.  The motor on these pumps comes in two different styles to access the wires, one with a small metal door, and one with a full cap. This guide will address both variations.


Step by Step


Step 1

VIEW LIST OF SIMILAR PUMPS - The picture at the left lists the pumps that at similar to the WhisperFlo pump. This guide will work to wire all five pumps for 115V.

Step 2

TURN OFF POWER - Before opening up the back of a motor, shut off all power to the motor at the circuit breaker.

Step 3

VIEW MOTOR STYLES - The styles of two motors addressed in this guide are shown here. Access to the electrical terminals for Style 1 is through a small door in the back of the motor. Access to the electrical terminals for Style 2, is provided by removing the whole back cover.

Step 4

STYLE 1 - REMOVE DOOR COVER - To remove the backdoor cover, loosen the two screws that hold it on and slide the plate away.

Step 5

VIEW 230V WIRING - This picture shows how the internal wires are attached to the four terminals for 230V wiring. This is how the motor will be ship to you. These wires will have to be moved to wire the motor for 115V.

Step 6

MOVE WHITE WIRE - Using a pair of needle-nose pliers, move the clip on the end of the White wire from terminal B to terminal L2.

Step 7

MOVE BROWN WIRE - Using a pair of needle-nose pliers, move the clip on the end of the BROWN wire from terminal A to terminal B.

Step 8

ATTACH BLACK SUPPLY WIRE TO L1 - There are three wires coming into the motor from its supply source. Attach the BLACK supply wire under the screw at terminal L1.
Note, when attaching a wire to a screw, wrap the bare end of the wire under the screw in a clockwise direction. When the screw is tightened, it will pull the wire into the screw and ensure a tighter connection.

Step 9

ATTACH WHITE WIRE TO L2 - Attach the WHITE supply wire under the screw at terminal L2.

Step 10

ATTACH GREEN WIRE TO GROUND - Attach the GREEN supply wire under the screw at the green ground terminal.

Step 11

REPLACE DOOR COVER - Slide the door cover under the two retainer screws. Tighten the screws with a Phillips head screwdriver.

Step 12

STYLE 2 – REMOVE COVER - The back cover of this motor is secured with one screw. Remove the screw and pull the cover straight back off of the motor.

Step 13

VIEW 230V CONFIGURATION - This picture shows the 230V configuration for Style 2. the terminals are labeled: A, L1, L2, and GND. The black dial is indexed at 230 as shown.

Step 14

ROTATE SELECTOR TO 115V - Changing the internal wiring for Style 2 is much simpler than for Style 1. Instead of switching wires, you only have to rotate the selector dial counter-clockwise from a setting of 230 to 115. Use a 1/2" open end wrench.

Step 15

FEED SOURCE WIRES INTO MOTOR - Feed the three supply wires of the power cord into the side port of the motor.

Step 16

ATTACH BLACK WIRE TO L1 - Push the connector on the Black power wire onto terminal L1.

Step 17

ATTACH WHITE WIRE TO L2 - Push the connector on the WHITE power wire onto terminal L2.

Step 18

ATTACH GREEN WIRE TO GROUND - Attach the GREEN wire under the screw at the ground terminal. Note: Terminal A is not used in this wiring configuration.

Step 19

REPLACE COVER - Tuck the wires in and replace the back cover. Secure the cover with the single screw in back.

Step 20

READY TO GO - Your motor is ready to go. Install it into the system piping, prime it, and add power (115V).


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 Posted: 12/5/2020 

I have a Pentair pump that needs a new motor. The old motor is set to 115v, but the input wires are red, black and green, and the circuit box has 2 breakers for the pump. Without a multimeter, how do I tell if I have 115 or 220 going to the pump? Last thing I want to do is fry the new motor by putting 220 into a 115 pump. The new Jacuzzi motor has a 115/220 selector.

InyoPools Product Specialist  Posted: 12/7/2020 

If the old motor was set to and running on 115 volts, then you have 115 volts. But if the previous installer didn't use traditional wire color coding to note voltage, then you should use a multimeter to be super sure.

 Posted: 11/15/2020 

Thanks guys.this sure saved me a lot of money.I am reusing the pump as an external pump to clean out and pump the dirt/algae out at the bottom of my pool.