Century Pool Pump Motor 3/4HP 1 Phase 60Hz 230/115V 56J | UST1072

The Century (formerly A.O. Smith) UST1072 is a premier replacement motor specifically designed for residential pool pumps. This 3/4 Total Horsepower (THP) motor features a 56J Frame and a threaded shaft, making it a perfect "drop-in" replacement for standard-rated 3/4 HP and 1/2 HP high-head pumps. Engineered with a high-service factor and an Open Drip-Proof (ODP) design, the UST1072 is built to deliver quiet, consistent power while staying cool, ensuring your water remains clear without the noise of a struggling motor.

Features

Universal 56J C-Flange: This industry-standard mounting style features a circular face with four bolt holes, providing a secure and precise fit for a wide range of pump housings from Hayward, Sta-Rite, Jacuzzi, and others.

Corrosion-Resistant Threaded Shaft: The 303 stainless steel threaded shaft is engineered to resist the harsh effects of pool chemicals and salt, ensuring a rock-solid connection to your pump's impeller for years of trouble-free service.

High-Service Factor (1.25): While rated at 3/4 HP, the 1.25 service factor provides a 0.94 Total HP output. This allows the motor to handle the resistance of long plumbing runs or dirty filters without straining or overheating.

Dual-Voltage Flexibility: Designed to operate on either 115V or 230V circuits. The internal terminal board is clearly marked and easy to access, allowing for straightforward wiring to match your current electrical setup.

Automatic Thermal Overload Protection: Features a built-in thermal sensor that automatically shuts down the motor if it reaches unsafe temperatures, protecting the internal windings from permanent damage.

Quiet and Cool ODP Housing: The Open Drip-Proof design maximizes airflow through the motor, keeping the internal components cool during the peak of summer and extending the overall life of the bearings and insulation.

Permanently Lubricated Ball Bearings: Equipped with high-quality, sealed ball bearings that require zero maintenance, providing smooth and quiet operation for the duration of the motor's life.

Specs

Notes

Common Pump Compatibility

The UST1072 is a direct motor replacement for many popular 3/4 HP 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 (Check 56J frame spec)

Important Installation Tip

Mandatory Shaft Seal Replacement: Whenever you replace a pool motor, you must install a new mechanical shaft seal (sold separately). A leaking seal is the leading cause of "new motor" failure, as water will travel down the shaft and destroy the front bearing. To protect your warranty, always use a new seal kit (e.g., PS-200 for Hayward Super Pump).