Century Pool Pump Motor, Threaded Shaft, 1.5HP 56J | UST1152
The Century (formerly Magnetek/A.O. Smith) UST1152 is one of the most widely used replacement motors in the pool industry. This 1.5 Total Horsepower (THP) motor features a 56J Frame and a threaded shaft, making it a direct "drop-in" replacement for many of the most popular high-head and medium-head pool pumps on the market. Built with a high-service factor and an open drip-proof (ODP) design, the UST1152 is engineered to withstand the demanding environment of a pool pad while providing quiet, consistent power to keep your filtration system running at peak performance.
Features
Universal 56J Frame Compatibility: Designed to fit a vast range of pump housings from major brands like Hayward, Jacuzzi, and Sta-Rite. The 56J mounting style features a circular flange with four bolt holes for a secure fit.
Durable Threaded Shaft: The 303 stainless steel threaded shaft provides superior corrosion resistance and ensures a tight, wobble-free connection to your pump’s impeller.
High-Service Factor (1.10): Engineered to handle brief periods of operation above its rated horsepower, providing extra "headroom" during high-resistance tasks like vacuuming or initial priming.
Auto-Reset Thermal Protection: Features an internal thermal overload protector that automatically shuts the motor off if it overheats, preventing permanent damage to the windings.
Cool-Running ODP Design: The Open Drip-Proof housing allows for maximum airflow to keep internal components cool, extending the overall life of the motor bearings and insulation.
Easy Wiring Access: Designed with a large, accessible terminal board and grounded connection point, making the electrical installation straightforward for DIYers and professionals alike.
Specs
| Horsepower (HP) | 1.5 |
| Total Horsepower (THP) | 1.5 |
| Frame Size | 56J (C-Flange) |
| Shaft Type | Threaded (303 Stainless Steel) |
| Voltage | 115V / 230V (Dual Voltage) |
| Amps | 18.6 / 9.3 |
| Speed | 3450 RPM (Single Speed) |
| Model Number | UST1152 |
Notes
The UST1152 is a direct motor replacement for many popular pump models, including:
Hayward: Super Pump, Super II, and MaxFlo
Sta-Rite: Dyna-Glas, Max-E-Glas
Jacuzzi: Magnum Series
Pentair: Various Challenger and WhisperFlo models (Check frame spec)
Important Installation Tip:
Always Replace the Shaft Seal: When replacing a motor, it is highly recommended to install a new pump seal kit (sold separately). Using an old seal on a new motor is the #1 cause of premature motor failure due to water leaking into the front bearing.
