Century Square Flange Pool Pump Motor, 2HP 230V 56Y | B2859
Century
SKU: B2859
Century B2859 2 HP 3450 RPM Square-Flange Pool & Spa Pump Motor
The Century B2859 is a robust, OEM-grade pool pump motor suitable for many in-ground pool and spa pumps from major brands. With a 2-horsepower rating and a 3450 RPM single-speed design, it provides strong, reliable circulation — ideal for larger pools or demanding filtration systems.
Key Features
- 2 HP nominal (≈ 2.2 HP total with 1.10 service factor) for strong hydraulic output.
- 3450 RPM, single-speed operation — simple, direct performance with no programming needed.
- Square-flange (56Y / 56Y-frame) mount with 5/8″ threaded stainless-steel shaft — fits many common wet-end pump housings designed for direct-drive motors.
- Single-phase 115/230 V compatibility with dual-voltage wiring — flexible replacement for older motors on 115 V or 230 V systems.
- Open-drip-proof (ODP) enclosure with continuous-duty rating and ball-bearing design — dependable long-term pump motor operation.
- Auto thermal overload protection and threaded shaft make installation and service straightforward.
Specifications
- Manufacturer: Century (Regal / A.O. Smith lineage)
- Model / Part Number: B2859
- Horsepower: 2 HP (2.2 THP with service factor 1.10)
- Speed: 3450 RPM, single-speed
- Voltage: 115 V or 230 V AC, single phase, 60 Hz
- Full-Load Amps (approx): 22.4 A @115 V / 11.2 A @230 V
- Frame / Mount: 56Y square-flange / face-mount (C-face) without base
- Shaft: 5/8″ stainless-steel, threaded (fine thread, 1/2″-20 / 5/8″ diameter)
- Enclosure: Open Drip-Proof (ODP), ball-bearing, continuous-duty rated
- Rotation: Counter-clockwise (pump-end view)
- Service Factor: 1.10
- Duty: Continuous / pool-rated
Applications & Compatibility
The B2859 serves as a direct replacement motor for many popular in-ground pool pumps and wet ends from manufacturers such as Pentair (e.g. WhisperFlo, Challenger, Pinnacle), Sta-Rite (Max-E-Glas, Dyna-Max, etc.), Jandy, and others that accept a 56Y face-mount motor. It’s a common choice when an original motor fails or when upgrading from an older or underpowered motor.
Installation & Maintenance Tips
- Confirm your pump housing accepts a 56Y square-flange motor with a 5/8″ threaded shaft before ordering.
- Replace the mechanical pump seal when installing the new motor — seals degrade over time and are often the root cause of leaks when reusing old motors.
- Ensure correct wiring for 115 V or 230 V supply and follow local electrical codes; double-check voltage labeling on the motor nameplate before wiring.
- After installation, prime and run the pump — listen for unusual noises, check for leaks, and verify adequate flow.
- Consider using vibration-dampening mounting pads or isolators if noise or vibration is a concern.
Why Use the B2859
For pool professionals and serious pool owners, the B2859 offers a proven, high-power, direct-drive motor solution that restores original pump performance or upgrades flow capacity. Its robust design and industry-standard mounting make it a versatile and widely compatible motor — a reliable choice when you want strong, consistent circulation without the complexity of variable-speed electronics.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 7:00 am to 5:00 pm Phoenix Time
Saturday: 8:00 am to 2:00 pm
Sunday: Closed
- We do not ship on Saturday or Sunday.
- Orders totaling more than $300 will require signature confirmation upon delivery.
- We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
- Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
- Expedited shipping options are available at checkout.
Return Policy:
- Products that are received damaged will receive a refund in store credit.
- Most products are eligible for return within 30 days of receipt, except where noted below.
- To initiate a return, please complete an RMA form prior to sending your item back.
- Original shipping costs are non-refundable and will be deducted from the return credit.
- Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
- Some returns will be charged an automatic 15% restocking fee.
- We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
- Please complete the return form to receive your RMA number and return shipping label.
- Chemical products are not eligible for return under any circumstances.
- The Pentair Colorsync 618031 is not eligible for return.
- Pool cleaners are not eligible for return.
- Opened seals and o-rings are not eligible for return.
- Capacitors are not eligible for return.
- Plastic popup tools are not eligible for return.
- Automation components and circuit boards are not eligible for return.
- If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
- Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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