Century HST110 Pool & Spa Pump Motor – 1.10 HP / 3450 RPM / 56J Frame
The Century HST110 is a professional-grade replacement motor designed for pool and spa circulation pumps. With 1.10 HP and a 3450 RPM single-speed design, this motor delivers reliable water flow for residential pools, spas, and small commercial systems — whether you’re replacing a worn motor or upgrading from an older, less efficient unit.
Key Features
- 1.10 HP (0.82 kW) output for solid pool/spa water circulation.
- 3450 RPM operating speed for strong, consistent flow.
- 115 V / 230 V dual-voltage compatibility for flexible installation options.
- Standard 56J frame with C-face flange — fits many common pump housings.
- Open-Drip-Proof (ODP) enclosure with sealed ball bearings on both ends — durable, long-lasting construction.
- Stainless-steel threaded shaft (5/8" diameter) for reliable impeller attachment and corrosion resistance.
- Automatic thermal overload protection for safe, maintenance-free operation.
Specifications
- Brand: Century (Regal Beloit / AO Smith legacy)
- Model: HST110
- Output: 1.10 HP (0.82 kW)
- Speed: 3450 RPM / single-speed
- Voltage: 115 V / 230 V (selectable)
- Full Load Amps: 13.6 A @ 115 V / 6.8 A @ 230 V
- Frame: 56J, C-face flange
- Shaft: 5/8″ threaded stainless-steel shaft
- Enclosure: Open Drip Proof (ODP)
- Bearings: Sealed ball bearings (203 class) front and rear
- Service Factor: 1.00 — continuous-duty rated for pool/spa service
- Rotation: CCW when viewed from shaft end (standard pump rotation)
Applications & Compatibility
This replacement motor is suitable for a wide range of pool and spa pumps that accept a 56J / C-face motor with a 5/8″ shaft — common on many single-speed pumps used in residential pools. Ideal for replacing failing or underperforming motors, or when updating an older pump body. Because of its 115/230 V flexibility, it's useful for installations where power configurations may vary.
Installation & Maintenance Tips
- Before installation — verify that your pump wet-end is compatible with a 56J, 1.10 HP, 3450 RPM motor (shaft size, flange bolt pattern, rotation).
- Ensure proper wiring and voltage selection to match your supply (115 V or 230 V) and meet local code.
- When installing, align the motor shaft and impeller carefully to avoid mis-alignment and premature seal or bearing wear.
- Provide adequate ventilation around the motor — although built for continuous-duty operation, good airflow helps prolong motor life.
- Inspect motor shaft and keyway during installation; confirm impeller is correctly seated and secure before restarting.
Why Choose the HST110
For pool and spa owners or service professionals needing a reliable, OEM-grade replacement motor, the Century HST110 strikes a balance of power, compatibility, and durability. Its standard frame and shaft size ensure broad compatibility, while 1.10 HP and 3450 RPM deliver consistent flow — ideal for everyday pool circulation, filtration, and cleaning needs.
