Pentair 355024S Square Flange Replacement Motor (Single Speed, 56Y, Almond)
The Pentair 355024S is an OEM square-flange replacement motor used on select Pentair pool pump applications. It’s a single-phase, single-speed motor with a 56Y square flange frame designed to bolt directly to compatible Pentair wet ends. This motor is commonly referenced for WhisperFlo power end configurations (WF-6 / WF-28) and may also appear on certain SuperFlo and other Pentair pump configurations depending on the exact model and revision.
Key Specifications
- Motor type: Pool/spa pump motor
- Speed: Single speed
- Phase: Single-phase
- Voltage: 115V / 208–230V (dual-voltage)
- Frequency: 60 Hz
- Frame: 56Y square flange (SQFL)
- Shaft: Threaded stainless steel shaft (typical for this motor series)
- Color: Almond / tan
- Horsepower note: Often listed as 1.5 HP in common pump applications; always verify by your pump model/parts diagram and the motor nameplate.
Common Applications (Verify Before Ordering)
- Pentair WhisperFlo power end configurations commonly labeled WF-6 and WF-28
- Some Pentair SuperFlo and other Pentair pump configurations that use a 56Y square flange motor (model/revision dependent)
Motor part numbers can vary by horsepower, service factor, and pump revision. Confirm compatibility using your pump’s model number and parts diagram, and match voltage/frame/shaft style to your existing motor label.
When to Replace the Motor
- Motor hums but won’t start, or trips the breaker on start-up
- Overheating, thermal shutdown, or intermittent operation
- Loud bearing noise (grinding/squealing) or excessive vibration
- Burnt odor, visible corrosion, or evidence of water intrusion
Installation Notes
- Shut off power at the breaker and verify it is off before servicing.
- Set the motor wiring for the correct supply voltage (115V vs 208–230V) before powering on.
- Replace the mechanical shaft seal anytime the wet end is opened during a motor swap (recommended).
- Inspect the seal plate, diffuser, and impeller for heat damage if the pump has run dry.
- After reassembly, prime the pump fully and check for leaks at the seal plate and plumbing connections.
Related Products (Aqua Pool Supply)
- WhisperFlo Shaft Seals (Search)
- WhisperFlo Gasket / O-Ring Kits (Search)
- Pump Motor Capacitors (Search)
- WhisperFlo Seal Plates (Search)
Maintenance Tips
- Fix wet-end leaks promptly—moisture around the motor is a common cause of premature motor failure.
- Keep baskets clean and maintain good water flow to reduce heat and strain on the motor.
- Ensure proper bonding/grounding and stable line voltage for longer motor life.
- Protect the equipment pad from sprinkler spray and standing water, and maintain ventilation around the motor.
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.
