Aladdin Whisperflo Diffuser Oring O-359
Aladdin
SKU: O-359
Aladdin Diffuser O-Ring for Pentair WhisperFlo & IntelliFlo Pool Pumps | O-359
The Aladdin O-359 Pump Diffuser O-Ring is a replacement sealing component designed for compatible Pentair WhisperFlo, IntelliFlo, and select Waterway swimming pool pumps. This O-ring replaces Pentair OEM part number 355227Z and helps maintain the proper seal around the pump diffuser.
Manufactured by Aladdin Equipment Company, the O-359 offers an aftermarket replacement option for worn, flattened, cracked, or deteriorated diffuser O-rings. A properly installed diffuser O-ring helps maintain the pump's intended internal hydraulic sealing and circulation performance.
Product Features
- Aladdin Replacement Part: Aftermarket O-ring manufactured for compatible swimming pool pump applications.
- Pentair Compatibility: Designed for select WhisperFlo and IntelliFlo pump assemblies.
- Diffuser Seal: Fits the designated sealing area around the pump diffuser.
- Direct OEM Cross-Reference: Replaces Pentair 355227 and 355227Z.
- Precision Sizing: 3-1/2-inch inside diameter with a 1/8-inch cross-section.
- Flexible Sealing Material: Designed for compatible pool pump operating conditions.
- Convenient Repair Component: Suitable for routine pump maintenance and diffuser replacement.
Product Specifications
- Manufacturer: Aladdin Equipment Company
- Manufacturer Part Number: O-359
- Product Type: Pool Pump Diffuser O-Ring
- Inside Diameter: 3-1/2 Inches
- Cross-Section Diameter: 1/8 Inch
- Nominal Outside Diameter: 3-3/4 Inches
- Color: Black
- Primary Application: Pump Diffuser Seal
- Compatible Brands: Pentair, Purex, and Select Waterway Applications
- Quantity: 1 O-Ring
Compatible Pool Pumps
- Pentair WhisperFlo WFE Series Pumps
- Pentair IntelliFlo VF Pumps
- Pentair IntelliFlo VS 3050 Pumps
- Pentair IntelliFlo VS+SVRS Pumps
- Other compatible Pentair WhisperFlo and IntelliFlo configurations using diffuser O-ring 355227Z
- Select Waterway SVL56 pump configurations requiring 805-0238B
Compatibility Note: Not every Pentair or Waterway pump uses the same diffuser seal. Verify the existing O-ring dimensions and original equipment part number before ordering.
OEM Replacement Cross-References
- Pentair 355227
- Pentair 355227Z
- Purex P-24262
- Purex 07-1444
- Waterway 805-0238B
- Fischer-Porter 101W816U01
What Does a Pool Pump Diffuser O-Ring Do?
The diffuser O-ring provides a seal around the pump diffuser, an internal component responsible for directing water from the impeller into the pump housing. Maintaining the correct internal seal helps the pump operate according to its intended hydraulic design.
Over time, exposure to heat, pool chemicals, and normal equipment operation can cause O-rings to lose elasticity or become flattened. Replacing a deteriorated diffuser O-ring during pump servicing helps restore the proper sealing interface.
When to Replace Your Diffuser O-Ring
- Existing O-ring is cracked, brittle, or flattened.
- O-ring has stretched and no longer fits correctly.
- Seal has become twisted, pinched, or damaged.
- Diffuser is being replaced during a pump repair.
- Internal pump inspection reveals deteriorated sealing components.
- Original O-ring is missing or damaged during disassembly.
Installation Instructions
- Turn off the pool pump and disconnect electrical power.
- Close applicable valves and completely relieve system pressure.
- Disassemble the pump wet end according to the manufacturer's instructions.
- Remove the diffuser and carefully remove the existing O-ring.
- Clean and inspect the diffuser O-ring groove and mating surfaces.
- Confirm the replacement Aladdin O-359 matches the original O-ring.
- Apply a light coating of pool-compatible silicone O-ring lubricant if permitted by the pump manufacturer.
- Install the new O-ring without stretching, twisting, or pinching it.
- Reinstall the diffuser and reassemble the pump according to the manufacturer's instructions.
- Prime the pump and inspect for normal operation.
Related Pentair Pump Replacement Parts
Complete your pump repair with genuine Pentair components available from Aqua Pool Supply.
- Pentair 355227Z – Genuine OEM WhisperFlo & IntelliFlo Diffuser O-Ring – Original Pentair replacement seal for compatible pump diffusers. This is the OEM alternative to Aladdin O-359.
Pentair Pump Parts Diagrams
Find additional replacement components using Aqua Pool Supply's illustrated pump parts diagrams:
- Pentair WhisperFlo Pump Parts Diagram
- Pentair IntelliFlo VS+SVRS Pump Parts Diagram
- Pentair WhisperFlo VST Pump Parts Diagram
Package Includes: One (1) Aladdin O-359 Replacement Pool Pump Diffuser O-Ring.
Important: This listing includes the diffuser O-ring only. The pump diffuser, impeller, mechanical shaft seal, pump housing, and other components are sold separately.
Compatibility: Aladdin O-359 is an aftermarket replacement for Pentair 355227Z and other listed OEM part numbers. Confirm your exact pump model and original O-ring before purchasing.
Installation Safety: Disconnect pump power and relieve all system pressure before servicing. Follow the pump manufacturer's maintenance instructions.
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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