Century Pool Pump Motor, Threaded Shaft, 2HP 56J | UST1202

The Century (formerly A.O. Smith) UST1202 is a robust, high-horsepower replacement motor designed for large residential and semi-commercial pools. With a 2.10 Total Horsepower (THP) rating, this motor provides the substantial torque required for complex filtration systems, extensive water features, and high-flow spa jets.

Featuring the industry-standard 56J Frame and a threaded shaft, the UST1202 is the go-to "drop-in" replacement for 2.0 HP high-head pumps, offering a perfect mechanical fit and the durability needed to handle high-demand summer operation.

Features

Universal 56J C-Flange: Designed with the standard circular mounting face and four bolt holes, ensuring a secure and precise fit for a wide array of pump housings from Hayward, Sta-Rite, Jacuzzi, and more.

Corrosion-Resistant Threaded Shaft: The 303 stainless steel threaded shaft is engineered to resist the corrosive effects of pool chemicals and salt, ensuring the impeller remains securely attached and easy to remove during future maintenance.

High-Service Factor (1.05): Rated at 2.0 HP with a 1.05 Service Factor, this motor delivers a 2.10 Total HP output. This allows it to maintain peak performance even under the heavy resistance of long plumbing runs or multi-feature water systems.

Dual-Voltage Flexibility: Capable of running on either 115V or 230V power. The internal terminal board is clearly marked, allowing for straightforward wiring to match your existing pool pad electrical setup.

Automatic Thermal Overload Protection: Includes a built-in thermal sensor that automatically cuts power if the motor exceeds safe operating temperatures, preventing expensive winding damage.

Advanced Cooling Design: The Open Drip-Proof (ODP) housing facilitates maximum airflow through the motor, keeping the heavy-duty bearings and internal insulation cool during the hottest months.

Specs

Notes

Common Pump Compatibility

The UST1202 is a direct motor replacement for many 2HP threaded-shaft pumps, including:

Hayward: Super Pump, Super II, MaxFlo, and NorthStar (Standard-Rated)

Sta-Rite: Dyna-Glas, Max-E-Glas

Jacuzzi: Magnum Series

Pentair: Various Challenger and WhisperFlo models (Verify 56J frame spec)

Important Installation Tip

Mandatory Shaft Seal Replacement: When installing a 2.0 HP motor, the torque and heat levels are significant. Never reuse an old mechanical shaft seal. A compromised seal is the most common cause of premature motor failure. Ensure you purchase a new seal kit (e.g., PS-200 for Hayward Super Pump) to protect your investment and maintain your warranty.