Century Pool Pump Motor, Square Flange, 1.5HP 48Y | USQ1152

The Century USQ1152 (formerly A.O. Smith) is a high-performance, up-rated motor designed for inground pool pumps requiring a Square Flange (48Y Frame). With a 1.65 Total Horsepower (THP), this motor provides the robust flow and pressure needed for heavy-duty filtration, multi-stage cleaners, and water features. Engineered with Class B insulation and a 303 stainless steel shaft, the USQ1152 is built to thrive in the high-heat, high-moisture environments typical of backyard pool pads.

Features

Up-Rated Power Performance: While rated at 1.5 HP, the 1.10 Service Factor delivers a 1.65 THP output, providing the extra "muscle" required for high-resistance plumbing and larger filters.

Universal 48Y Square Flange: The standard square mounting face with four non-threaded bolt holes ensures a precise "drop-in" fit for industry-leading pumps like the Pentair WhisperFlo and Sta-Rite Max-E-Pro.

303 Stainless Steel Threaded Shaft: The high-grade 5/8" threaded shaft resists rust and chemical corrosion, ensuring your impeller remains securely attached and easily removable for future maintenance.

Class B Insulation & 50°C Ambient Rating: Engineered to run safely in ambient temperatures up to 122°F (50°C). The Class B insulation protects internal windings from heat stress, significantly extending the motor's lifespan.

Capacitor Start Design: Provides high starting torque to ensure the pump primes quickly and efficiently every time, reducing wear on internal components.

Sealed Ball Bearings: Features permanently lubricated, high-quality ball bearings that ensure quiet operation and reduce the need for ongoing mechanical maintenance.

Open Drip-Proof (ODP) Housing: Designed to maximize cooling airflow through the motor while protecting the internal electrical components from falling moisture and debris.

Integrated Auto Protector: Features an internal thermal overload switch that automatically shuts the motor off if it overheats, preventing permanent damage from jams or electrical surges.

Specs

Notes

Common Pump Compatibility

The USQ1152 is the standard replacement motor for square-flange versions of these popular pumps:

Pentair WhisperFlo, Challenger, and SuperFlo (Square Flange)

Sta-Rite Max-E-Pro, Max-E-Glas, Dyna-Glas, and Dyna-Max

Jandy PlusHP, Stealth, and FloPro.

Pro-Tip for Installation

Change the Shaft Seal: A new motor is a significant investment. Never install a new motor with an old mechanical shaft seal. A leaking seal is the #1 cause of bearing failure. For a Pentair WhisperFlo, ensure you have a PS-1000 seal; for Sta-Rite, a PS-200 or PS-3867.