Part # UST1252
Warranty 1 Year
Dimensions 16" L x 8.5" W x 6.5" D
Alternate Part #'s 12020, 164135, 177022, 184951, 5KCR39UN6181X, 90118597, B231, B231SE, C1149, EB231, JH25UP1, K48N2N106, K48N2N106A1, K48N2N106A3, K48N2N106A9, K48N2N106C2, K48N2N113A6, SP1620Z1M, SP1620Z1MBK, UST1252, V12020
Voltage 230, Max Amps 230V = 11.2, Single Speed, Round Flange, RPM = 3450, Threaded Shaft, Frame = 56J Used on the following models: Hayward Max Flow, Hayward Super Pump, Hayward Super II, Hayward Northstar and Jacuzzi Magnum pumps.
I am looking to replace a pool motor UST 1252. Found in on your webpage along with tune-up kit. I was having pump leak problems at the seam between pump and main housing. Thinking of replacing at same time. Do you have a complete kit or only parts ?
Hi Mike, we may have a kit but we would need to know the make and model of your pump. This should be something like Hayward Super Pump, Hayward Super II, Jacuzzi Magnum, etc.. Could you please email back with your pump details.
I have a 2 year-old UST1252 motor. I believe the start capacitor is failing - perhaps the run capacitor as well. The pump generally does not start (hums and then shuts down and/or breaker trips) the first time after sitting for a while. Flow seems good once it runs and the impeller seems to move freely (I have only reached in through strainer side, have not removed the pump (yet). All that said, can you tell me the size/ratings for the capacitors? Thanks! Ken
Hi Ken, The A.O. Smith (UST1252) uses a Run Capacitor 30 MFD 370V (5VR0303) and Start Capacitor 36-43 MFD 120V (BC-36).
I'm trying to replace the motor on my pool pump but all these numbers and abbreviations on the motor label are really confusing me. What do they mean?
Replacing a pool pump motor is not as difficult as it seems. You can try looking here. If you need help figuring out what the information on your label means. If you are still having difficulty figuring it out you can call us at our toll free number or you can send us a photo of your motor label here.
I'm trying to find a replacement motor for my pool pump but my model number doesn't match what you have listed as the model number. My model number begins with a C48 and yours begins with an SP. Please help.
What we have listed on our chart pages is the pump model number. The model number you have will just identify the motor. If you look on the plastic housing on the pump there should be a sticker which will have the pump model number. You can usually find this by the discharge port on the pump. Once you locate it you can choose the correct replacement motor. Be certain to change the shaft seal and gaskets as needed. You can use our >How to guide if you need help.
Why should I purchase a Tune Up Kit?
A Tune Up Kit includes all of the essential replacement seals and gaskets for the pump. The seals and gaskets should be replaced when installing a new motor on your pump. New seals will prevent the pump from leaking water or losing the prime. A Tune Up Kit will protect your motor and ensure that the pump is working efficiently.
Why do I need to purchase a new shaft seal?
We strongly recommend replacing the shaft seal. The purpose of a shaft seal is to prevent water from running down the shaft of the motor and into the motor housing. Water will damage the bearings and cause the motor to fail. A new shaft seal should be installed whenever a motor is replaced. The motor manufacturer can deny the warranty if the motor fails to due to water damage from a faulty shaft seal. To find your shaft seal you will need to visit our Pool Pump Parts Page or the Spa Pump Parts Page and select your make and model.
What is Service Factor?
Service Factor(SF) is a multiplier that when multiplied by the horsepower of the motor indicates the total permissible horsepower loading that may be carried when the motor is operating at rated voltage and frequency. The most important thing to remember when replacing a motor is that the replacement motor's horsepower times its service factor must be equal to or greater than the original motor's horsepower times its service factor. The Service Factor rating can be found on the motor label. See Step 4 of our How to Read a Pool Motor Label guide.
The Most Helpful Review
138 7
(5 out of 5 stars) Excellent Pump Moter Replacement
Reviewed By: PoJo from Clarence, NY ()
Pros: Awesome fit - excellent replacement
Cons: none
Tip to get the impeller off the old pump moter: use a 7/16" open ended wrench - it slides in near the capacitor on the electrical side... rotate the impeller until the wrench slides into place at the end of the shaft and then one person holds the motor and the wrench while a 2nd person loosens the impeller off with bare hands by turning the impeller counter clock-wise.
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The Most Recent Reviews
(5 out of 5 stars) Great motor at the Best Price
Reviewed By: peejmeister from Lucas, TX ()
Pros: Great price, quiet motor.
Although there was an initial glitch in getting this shipped, the Support team expedited it and got it out shortly thereafter. The motor installed easily (following the great how-tos on this site) and runs like a champ, and is extra quiet. I would recommend this motor for any application it fits. I've been very satisfied with its performance.
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(4 out of 5 stars)
Reviewed By: James L. from Kansas City mo ()
Great motor for the money
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1 0
(4 out of 5 stars) Great swimming pool filter pump motor
Reviewed By: Janice T. from Franlkin Lakes, NJ ()
Pros: Reasonably quiet, long life.
Cons: Impeller removal is difficult and dangerous
The motor is great. I had to replace it for my filter pump only after 14 years of hard use. The motor could use an improvement where you have to hold the motor in place to remove the impeller. The back assembly needs to be removed and the starting conductor as well. I feel it could be easy to damage some of the parts in order to hold the motor in place while unscrewing the impeller. They could provide a small slot where a wrench can be inserted away from the conductor and wires.
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(5 out of 5 stars) swimming pool pump motor
Reviewed By: Dawn R. from Houston, TX ()
Pros: Shipped quickly and received on time
Cons: none
This motor replaced the old one exaclty. No problems runs perfectly.
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(5 out of 5 stars)
Reviewed By: Penny M. from Milford,TX ()
Pros: Fast Shipping, Item In Stock
Cons: Price
Item shipped fast arrived on time and was exactly what I needed.
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(5 out of 5 stars) Good motor
Reviewed By: Kawana from Los Gatos ()
Pros: Easy swap
Cons: none
Quick, easy, and cheap... what more can you say? great motor.
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1 0
(5 out of 5 stars) Great pump motor price!
Reviewed By: Handy Man from Sebring, Florida ()
Pros: Great Price, Great Research Information!
Cons: None
Motor was researched at this website and the information was right on, using the pumps' make and model. I will recommend this site to my neighbors and friends!
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