Description
The US Motors 3257 is a dependable split phase circulating pump motor engineered for hydronic heating systems, hot water circulation, and light-duty pump applications. Built to perform in demanding HVAC environments, this motor delivers consistent, efficient operation with a robust construction designed for long service life.
Motor Specifications
- Horsepower: 1/6 HP
- Voltage: 115V AC
- Phase: Single Phase
- Speed: 1725 RPM
- Amperage: 3.8 Amps
- NEMA Frame Size: 48YZ
- Motor Type: Split Phase
Construction & Design
- Enclosure Type: Open Drip Proof (ODP) — protects internal components from dripping liquids and falling debris
- Bearing Type: Ball Bearing — provides smooth, low-friction operation and extended motor life
- Mount Type: Bracket Mount — for easy, secure installation in a variety of pump configurations
- Shaft Diameter: 1/2″
- Shaft Rotation: Counter-Clockwise (CCW) viewed from switch end
Application
The US Motors 3257 is ideally suited for use in hydronic circulating pump systems, including hot water heating loops, boiler circulation, and similar HVAC hydronic applications. The 48YZ NEMA frame ensures compatibility with a wide range of standard pump housings, making it a reliable drop-in replacement for worn or failed circulating pump motors.
Why Choose the US Motors 3257?
- Industry-standard 48YZ NEMA frame for broad compatibility
- Ball bearing construction for reduced maintenance and longer service intervals
- Open drip proof enclosure suitable for indoor mechanical room installations
- Bracket mount design simplifies installation and replacement
- Trusted US Motors quality for reliable, long-term performance







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