Product Information
Description
A.O. Smith Century UST1102 Pool Pump Motor
1 HP Up-Rated, 115/230V, 56J Round Flange C-Face.
A.O. Smith Century UST1102 (PST SKU PST-UST1102) is a 1 HP up-rated, single-phase, single-speed pool and spa pump motor on a 56J round flange C-Face body with a 5/8 in threaded stainless shaft. Dual voltage 115/230V, 3450 RPM, 1.10 service factor, sealed ball bearings, ODP enclosure. Direct replacement for the OEM motor on most Hayward Super Pump, Super II, Max-Flo, and NorthStar pumps, plus the Jacuzzi Magnum line.
| Frame | 56J Round Flange |
|---|---|
| Mount | C-Face, no base |
| Shaft | 5/8 in x 1-7/8 in threaded, 303 stainless steel |
| Rotation | CCW from shaft end |
| Body | Round, corrosion-resistant shell |
| Bearings | Sealed ball bearings, both ends |
| Horsepower | 1.0 HP up-rated (1.10 SF HP = 1.10 total HP) |
|---|---|
| Voltage | 115V / 230V dual, single phase |
| Current | 15.0 A at 115V, 7.5 A at 230V |
| Speed | 3450 RPM, single speed |
| Frequency | 60 Hz |
| Switch | Sealed centrifugal |
| Service Factor | 1.10 |
|---|---|
| Enclosure | ODP (Open Drip Proof) |
| Ambient | 50 C maximum |
| Design | NEMA 1081 |
| Duty | Continuous |
| Manufacturer | A.O. Smith / Century (now Regal Beloit) |
|---|---|
| Model | UST1102 |
| Series | Centurion, Up-Rated |
| PST SKU | PST-UST1102 |
- Hayward Super Pump (SP1600 series, SP2600 series, SP3000 series)
- Hayward Super II Pump
- Hayward Max-Flo and Max-Flo II
- Hayward NorthStar
- Jacuzzi Magnum
- Jacuzzi JWB / JBI / JBL series
- Any 1 HP pump using a 56J round-flange threaded-shaft motor on a C-Face mount
Up-Rated vs Full-Rated
The UST1102 is up-rated, the nameplate horsepower (1.0 HP) plus service factor headroom (0.10 SF) equals about 1.10 total HP. Pump manufacturers spec up-rated motors for residential pools because the same physical motor can be sold at a lower HP rating for cost. For a full-rated 1.0 HP motor at this frame, see the URS1102.
Wiring 115V vs 230V
Follow the wiring diagram on the motor end cap. Set the voltage jumper inside the conduit box to match your service. Always disconnect at the breaker and verify zero voltage before opening the conduit cover. Bond the motor to the pool equipotential grid per NEC 680.
Should I switch to a variable-speed motor?
Yes if your state requires it (CA, FL, AZ, several others mandate variable speed on most replacements) or if you run the pump more than 4 hours a day. A VS motor pays back the price premium in 2 to 3 seasons through reduced kWh. For pure replacement on a low-cycle pool or per code grandfathering, the UST1102 is the lowest-friction swap.
Additional Info
| Category | Parts Pool Parts Pool Pump Parts |
| SKU | PST-_UST1102 |
| MPN | UST1102 |
| Manufacturer | A.O. Smith |
| Weight | 21.1 lb |
Let customers speak for us
Easy to use. Great instructions. Cleans great so far.
Easy to order - received the next day!
Beautiful!!
The valve fit perfectly and works great.
Fast shipping and great price!
Does what a small weed- eater would do it minutes versus an hour
Great product does exactly what was advertised to do.
I ordered the wrong part. Customer service was very helpful. I returned it and within the week my credit card was credited back. Excellent customer service policy.
There was a delay in shipping due to postal service. They sent another part right away.
New model 59303 works great, but too bad the last generation Balboa WiFi module 50350 became un-useable.
Exactly as advertised and super fast shipping and delivery
