A.O. Smith 1 HP Round Flange 56J Up Rate EE Motor - UCT1102



Part # UCT1102

By A. O. Smith

  4.9 Average  



Part # UCT1102

Warranty 1 Year

Alternate Part #'s 10-184948-22, 184948, K48A82A04, K48K2N100A2, K48K2N104, UCT1102

Product Description

Replace your  Pump Motor with an Energy Efficient model UCT1102.  Our Energy Efficient UCT1102 replacement motor cost roughly 33% less to operate than the standard UST1102  replacement motor.  In most states you will recoup the cost difference between the standard motor and Energy Efficient Motor within 4-6 months.

Voltage 115/230, Max Amps 115V = 11.0 230V = 5.5, 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.

Note: NOT California Title 20 Compliant. 

California Title 20 Compliant Options:


Motor Dimensions Motor Dimensions
Motor Image Motor Image

Product Specifications

Motor Name:
1 HP UCT1102 Replacement Pool Motor
1 HP
3450 RPM
115/230 V
11.0/5.5 amp
Service Factor:
Total HP:
1 HP
Stock #:
Overload Protector:
Dimension Letter:
11 - 11/16 in.
Commonly Used On:
Hayward Max Flow, Hayward Super Pump, Hayward Super II, Hayward Northstar and Jacuzzi Magnum
Energy Efficient:
Energy Efficient
NOT California Title 20 Compliant

?     Asked on 9/10/2018 by Brad

Hi, just wondering what size bearings are correct for the UCT1102. Thanks

A  Answered on 9/11/2018 by InyoPools Product Specialist Hector F.

You will need two bearings. Part number 5270-31 is the rear bearing and part number 5270-36 is the front bearing. 

?     Asked on 8/20/2018 by Ted Lee

I purchased a new Motor CT1072 from you for my Hayward Superpump II. I need to connect my existing cord to the new motor. The existing motor is set at 230V. The heavy duty cord has three wires. Two green and one black. One green which is longer than the other I know is connected to the ground screw. Where do the other two wires go and which one is the hot wire (black or green). Also does this motor come pre-set at 230V and if not how do I change it from 110 to 230V.

A  Answered on 8/24/2018 by InyoPools Product Specialist Lennox H.

Hi, Ted. Once you've identified the Ground, the other two wires are your HOT (115 volt) leads.  I would recommend that you use multi-meter to test the leads confirming the voltage.

?     Asked on 12/5/2017 by Mark

I am want to replace a standard 1 hp AO Smith/Hayward motor C48K2N143B1 with a EE Version is UCT1102 the correct replacement? Is the GoKit3salt the correct seal with everything I need to perform the motor swap on a Hayward SP2607X10 ? Do you recommend anything else for require parts to perform the swap?Thanks

A  Answered on 12/6/2017 by InyoPools Product Specialist Lennox H.

Hi, Mark. The UCT1102 and GOKIT3SALT are the parts you will need to convert your pump to a more efficient pump and replace the seals. 

?     Asked on 7/12/2017 by Dale

Will the Energy Efficient 1 HP UCT1102 motor be a direct replacement for my 1 HP A. O. Smith ST1102 (1081 Design) motor and does it come with a shaft seal or must I order that separately? I already have a 3-piece Hayward pump seal kit. Thanks, Dale

A  Answered on 7/12/2017 by InyoPools Product Specialist Patrick P.

Hi Dale, This UCT1102 is not a replacement for your ST1102 Motor. Please click this link for the UCT1152 Energy Efficient Replacement Motor that you will require. Your ST1102 motor is a 1 HP full rate motor which is equivalent in power to the UCT1152 motor which is a 1.5 Up Rated Motor. The motor does not come with a shaft seal. I'm not sure which Hayward Pump you have so I can't make a suggestion on a seal, the most popular Hayward Pump is the Hayward Super Pump, if you have a Hayward Super Pump then you will need this Hayward Super Pump Shaft Seal.

?     Asked on 6/7/2017 by Matthew Hindman

1) What other parts will I need to buy when replacing the motor - New impeller, seals? 2) Will this motor work as a replacement to: SP-1605-Z1-M Model: C48J2N122 SER C77 Volts 115/230 RPM 3450 Amps 10.6/5.3HP 3/4 FR 56J

A  Answered on 6/12/2017 by InyoPools Product Specialist Lennox H.

Hi, Matthew. I would recommend getting the pump seal and the o-rings but I will need the model number of the pump housing. The correct replacement motor for the C48J2N122 motor is p/n UST1072.

?     Asked on 5/31/2017 by georef

Can I use this energy-efficient motor on my existing 115V/15 Amp GFCI circuit?

A  Answered on 6/3/2017 by InyoPools Product Specialist Lennox H.

Hi, Georef. You can if this motor is the only equipment being used on that circuit.

?     Asked on 5/28/2017 by Nate

The SF of this motor is 1.0 where the SF of UST 1102 is 1.10 I thought that the SF of the replacement motor must equal or exceed the previous motor...

A  Answered on 5/29/2017 by InyoPools Product Specialist Patrick P.

Nate you are correct however since the SF difference is so minimal we have not seen any issues using the UCT1102 as a replacement for the UST1102. The manufacture Century also promotes the UCT1102 as an energy efficient replacement to the UST1102 and you would have the full 1 year warranty if using this motor as a replacement to the UST1102.

?     Asked on 5/14/2017 by Mike

is this the same as c48k2n143 ?

A  Answered on 5/14/2017 by InyoPools Product Specialist Hector F.

This is an energy efficient version of that motor.

?     Asked on 4/6/2017 by Kim

Can I use this motor to replace an AO Smith C48K2N117A9

A  Answered on 4/6/2017 by InyoPools Product Specialist Alex V.

Kim, Thank you for your question. Can you please attach a photo of the existing motor label? There are some specs we will need to confirm.

?     Asked on 12/28/2016 by Dale

Replacing my C48L2n134c2, is this the correct replacement motor? Also, can you confirm the seal kit? Thanks

A  Answered on 12/29/2016 by InyoPools Product Specialist Alan M.

Hello - the correct direct replacement motor is the A.O. Smith 1 HP Full Rate Round Flange Motor - ST1102. If you want the Energy Efficient alternative, you can use the A.O. Smith 1 HP Energy Efficient Round Flange Up Rate Motor - UCT1102. The seal kit is based on the make and model of the PUMP you have (not the motor). You will need to identify the pump information in order to determine the correct seal kit you need.

?     Asked on 7/22/2016 by joey

will this be an exact fit to replace a Hayward model number C48K2N143B1 1 HP KW .75 115/230 volts SP1607Z1-M

A  Answered on 7/24/2016 by InyoPools Product Specialist Lennox H.

Hi Joey, Yes, the UCT1102 is the energy efficient replacement to the C48K2N143B1 motor.

?     Asked on 6/20/2016 by Angie

I want to replace my dead motor Model # C48K2N143B1 with a more efficient one. I was wondering if I should get the UCT1102 or the UCT1152? Thank you, for your time and help in advance.

A  Answered on 6/20/2016 by InyoPools Product Specialist Patrick P.

Hi Angie, The energy efficient version of your C48K2N143B1 motor would be this UCT1102 motor and this would be the correct replacement for you.

?     Asked on 6/10/2016 by

The run capacitor hump housing on my UCT1102 is completely rusted out. Is there anyway of finding a replacement part?

A  Answered on 6/19/2016 by InyoPools Product Specialist Alex V.

Hello, Please provide the specs and dimensions of your existing capacitor.

?     Asked on 5/8/2016 by

Additional info......capacitor is 161-193MFD.

A  Answered on 5/11/2016 by InyoPools Product Specialist Lennox H.

Hi, If you're needing the replacement capacitor the BC-161 will be the correct capacitor.

?     Asked on 2/27/2016 by

do you sell bearing repair kits. Model # K63CXEPY-4766. it is made by U.S. Motor

A  Answered on 3/1/2016 by InyoPools Product Specialist Lennox H.

Hi, We do not have the bearing info for the U.S. Motors, I would recommend contacting U.S. Motors at 888-637-7333 for assistance.

?     Asked on 11/16/2015 by John

What other parts such as a new seal should also be installed when putting in a new pump

A  Answered on 11/16/2015 by InyoPools Product Specialist Hector F.

This will be dependant on the condition of the other parts. You may need to replace some of the other seals and gaskets as well. Usually we recommend to purchase the entire seal kit just in case they are needed. The kit type would be dependant on the model of the front pump housing. It would also be wise to inspect the impeller as well for any damage or cracks.

?     Asked on 8/15/2015 by jack aldrich

Is this motor now made by Century???

A  Answered on 8/15/2015 by InyoPools Product Specialist Matt S.

Technically, yes. A.O. Smith and Century Motors merged into a larger manufacturing company called Regal Beloit. The sticker on the motor may say, A.O. Smith or Century.

?     Asked on 8/12/2015 by Kent

Hello! Does the UCT1102 motor have a built in timer? Thank you!

A  Answered on 8/13/2015 by InyoPools Product Specialist Robert M.

Hello Kent - The UCT1102 does not have a built in timer.

?     Asked on 4/26/2015 by Wayne G.

I am looking to replace an ST1102 1HP motor on a Hayward Superflow pump. I think I would like to upgrade to variable speed for more energy effeciency. I see the STS1102 and UCT1102 and was wondering what the difference is? Also, it appears that I would need some additional parts, like a timer or special switch, is that correct? I also have to ensure that the replacement motor is the exact same length as the installer left me barely enough room to extract the motor. Thanks for your help!!!

A  Answered on 4/27/2015 by InyoPools Product Specialist Patrick P.

Hi Wayne, The STS1102 is a dual speed replacement motor and the UCT1102 would be an energy-efficient single speed motor, neither of these would be a variable speed motor. Here is the link to the Variable Speed Motor for the Hayward Super Pump, the variable speed replacement motor does have a controller so no additional timer would be needed. We have Detailed Dimensions of the Hayward Super Pump Variable Speed Replacement Motor here, I would take a look at these dimensions to determine if this motor will work for you. We would also highly recommend a Hayward Super Pump Tune Up Kit when replacing your motor.

?     Asked on 5/2/2013 by Guest

Will the AO Smith UCT1102 cost less to run than the UST1102?

A  Answered on 5/2/2013 by InyoPools Product Specialist Patrick P.

Yes, the UCT1102 will cost less to operate compared to the standard UST1102. Depending on how the motor is cared for, it should last several years. When replacing the motor, I would recommend buying a tune up kit based on your pump model and age.

?     Asked on 1/19/2012 by Guest

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?

A  Answered on 1/19/2012 by InyoPools Product Specialist Patrick P.

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.

?     Asked on 1/18/2012 by Guest

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.

A  Answered on 1/18/2012 by InyoPools Product Specialist Patrick P.

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. 

?     Asked on 1/12/2012 by Guest

Why should I purchase a Tune Up Kit?

A  Answered on 1/12/2012 by InyoPools Product Specialist Patrick P.

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.

?     Asked on 1/12/2012 by Guest

Why do I need to purchase a new shaft seal?

A  Answered on 1/12/2012 by InyoPools Product Specialist Patrick P.

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.

?     Asked on 1/11/2012 by Guest

What is Service Factor?

A  Answered on 1/11/2012 by InyoPools Product Specialist Patrick P.

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.


Est. Repair Time

2 to 4 hrs

Tools Needed

Screwdriver, Pliers, Socket Set

My Hayward repayment motor stoped working

Written on 4/26/2018 by Guest

I simply took a picture of the label and sent it to INYO pool and they emailed me a couple of mothers to choose from with detailed instructions , I even called to ask a couple of questions and the lady on the phone was so helpful

Were these instructions helpful? 


Review Summary

 (Average 4.9  out of 5 stars)
47 Rating
5 star:
4 star:
3 star:
2 star:
1 star:

The Most Helpful Review

The Most Recent Reviews