How To Choose The Right Replacement Pool Pump Motor


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At one point or another, you will need to replace your pool pump motor. Replacing it with an exact match is important otherwise the motor may burn out prematurely. There are a few things to look for when ordering a replacement motor. This guide will help you understand the world of swimming pool pump motors a little better.

Step by Step


Step 1

The easiest way to find out your motor information is on the motor label itself. It will usually list the model or category number. The motor pictured to the left is an AO Smith UST1152 (C48L2N134C1).

Step 2

If you have an AO Smith motor and a part number similar to the UST1152 (C48L2N134C1) is visible, you can enter it into the search by keyword or part number on our website and it will bring you directly to the motor page.

Step 3

Once you're on the motor page, you will find the motor specs listed. You will want to compare and the specs to what is listed on your current motor label. The most important information you will need are the horse power (HP), amps, voltage, service factor (SF), hertz (HZ), frame (FR) and revolution per minute (RPM).

Step 4

If the model or category number is not legible on the motor label, you will need the information on the pool pump (pump housing) to find the right motor. The label will likely include the pump model and the serial number. Unfortunately only the manufacturer has access to the serial number.

Step 5

If you insert the pump model (SP2810X152) in the search box and click go, it should return with a result. Once on the item page, click on the parts tab, then on the replacement parts link.

Step 6

Once on the parts page, you should be able to locate your replacement motor. Once again, you will want to compare and the specs to what is listed on your current motor label (if legible).

Step 7

When I receive a call from a customer asking for a replacement motor, there are a few key questions I will ask: What is the manufacturer and model of the pool pump (not the motor)?, What is the horsepower of the motor?, What is the frame of the motor?, What is the voltage?, What is the service factor?, What is the RPM?, and more general information about the pump (color, shape etc.) if necessary. If all else fails, I will ask for a photo of the pool pump.

Step 8

The reason I ask these questions is because this key information will lead me to a replacement motor. Let's look at the questions: What is the manufacturer and model of the pool pump (not the motor)? If the customer tells me Pentair, then I know that I will likely be looking for a square flange motor (56Y or 48Y frame) because Pentair/Sta-Rite and Jandy (sometimes) use these types of motors for their pumps. The only difference between the 56Y and 48Y is the circumfrence (width) of the motor. They will both mount to the seal plate but the 48Y will need an optional spacer (that comes with the motor) to sit on to make up for the difference in size.

Step 9

If it's a Hayward pump, I will likely be looking for a round flange (56J frame) motor. Jandy also uses 56J frame motors on some of their pump models. This isn't always the case but the questions above will narrow down my search. Once I figure out the type of motor the customer needs, I then try to match up the pump model number or motor specs.

Step 10

If all of the above fails, I will ask for a picture of the pump housing and the motor label.


(1 to 10 of 10)

Inyopools  Posted: 02/13/2017 10:10 AM  Inyo Product Specialist

lee - Sorry, but I can't identify the make of your pump on the information you listed. Please talk to one of our service rep at 877-372-6038. They will probably ask for a couple pictures of your pump.

lee  Posted: 02/07/2017 10:36 AM 

? HI, Im trying to find out what brand my pool pump is and have searched everywhere and cant find it, thanks
?model 72751
?motor model RS4F35712L
?VOLTS 230 HZ 60 HP 1.5

Inyopools  Posted: 02/03/2016 10:34 AM  Inyo Product Specialist

Susan - Generally the information you need to replace a pump motor is Model Number, the HP, the SF (Service Factor), the FR (Frame). In your case the Model Number may be sufficient. Please call our office at 877-378-6038 and one of our service reps will be happy to look at your motor label pictures and resolve this for you.

Inyopools  Posted: 02/03/2016 10:14 AM  Inyo Product Specialist

R56J vs 56J - There is no difference. They are the same frame.

Susan  Posted: 02/02/2016 9:02 AM 

Just help me please. I have an older motor. Frame:R48Y volts 230/115 rpm: 3450 Serial 186506 Brand Name Magnetek Century Neptuen 1081
amps (all I could read) SF5 What other info do i need and I have pictures

Anonymous  Posted: 02/01/2016 21:56 PM 

What is the difference between 2HP AO Smith R56J frame and a 56J without the R?

Inyopools  Posted: 09/10/2015 13:51 PM  Inyo Product Specialist

Darrin - Not sure what you currently have. Most "Y" frame motors come with a square motor mounting flange that attaches to the seal plate. If you haven't already, please call our office at 877-372-6038 and talk to one of our service reps. The will be able to clear up any confusion quickly.

Darrin  Posted: 09/02/2015 13:24 PM 

Hi, it says above that a 56Y and 48Y will both mount to the seal plate but the 48Y will need an optional spacer (that comes with the motor) to sit on to make up for the difference in size. I have a motor that I need to replace. It is a 56Y but it does not have the square plate on the end of the one like this one - I just need the motor. Can you help me determine which one is right for me, please? I can send photos and details, too.

Inyopools  Posted: 08/03/2015 9:37 AM  Inyo Product Specialist

Art in fl - No, a 56J motor (round) cannot fit on a 56Y frame (square).

Art in fl  Posted: 08/01/2015 13:13 PM 

Can you use a 56j motor on a 56y frame