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Pentair WhisperFloXF Diffuser O-Ring 350336Z

Pentair SKU: 350336Z

Pentair WhisperFloXF Diffuser O-Ring 350336Z

Pentair SKU: 350336Z
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Pentair 350336Z Diffuser O-Ring

The Pentair 350336Z is a genuine replacement diffuser O-ring used on select Pentair and Sta-Rite XF Series pool pumps. This O-ring seals the diffuser area inside the pump wet end, helping maintain proper water flow, prime, and pump efficiency.

Product Features

  • Genuine Pentair replacement part
  • Part number: 350336Z
  • Also commonly listed as part number 350336
  • Seals the diffuser inside compatible XF Series pump wet ends
  • Helps prevent internal bypass, air leaks, and loss of hydraulic performance
  • Recommended replacement when servicing the diffuser, impeller, or pump wet end

Common Compatibility

  • Pentair IntelliFloXF variable speed pumps
  • Pentair WhisperFloXF pumps
  • Sta-Rite IntelliProXF variable speed pumps
  • Sta-Rite Max-E-ProXF pumps
  • Select XF Series pump diffuser assemblies

When to Replace

Replace the diffuser O-ring if it is flattened, cracked, stretched, brittle, swollen, or no longer seals properly. A worn diffuser O-ring can contribute to poor priming, reduced flow, noisy operation, and lower pump performance.

Installation Tips

  • Turn off power to the pump at the breaker before servicing.
  • Relieve pressure and close valves before opening the pump wet end.
  • Remove the old O-ring and clean the diffuser groove before installation.
  • Apply a light coat of pool-safe silicone lubricant to the new O-ring.
  • Make sure the O-ring is seated evenly before reassembling the pump.
  • Inspect the diffuser, impeller, shaft seal, and other wet-end components while the pump is apart.

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Maintenance Tips

Whenever servicing the pump wet end, inspect all O-rings and seals for wear. Replacing small sealing parts during pump service can help prevent leaks, priming issues, and repeat disassembly. Use only pool-safe silicone lubricant on O-rings and avoid petroleum-based products. Always verify your pump model and parts diagram before ordering replacement parts.

Questions about returns? View our return policy.

Hours Of Operation: 

Monday - Friday: 8:00 am to 4:00 pm Phoenix Time

Saturday and Sunday: Closed

  • Orders costing more than  $300 WILL be required to have signature confirmation upon delivery.
  • Handling time is typically only 1 day.   
  • Any item ordered after 1pm Phoenix time, may not ship same-day.
  • Call us if you require expedited shipping and we can give you quotes based on your needs.

Return Policy:

  • All products, except as noted below, are eligible for return up to 30 days after receipt of item.
  • For returns, an RMA form must be filled out HERE or customers can call for additional help.
  • Shipping costs will be deducted from all returned items.
  • Any item that is missing accessories, original packaging, or is not returned in the same condition that it was received in, may be subject to a re-stocking fee up to 100% based on the condition we receive it in. 
  • Items broken, damaged, or inoperable due to installer error will not be refunded.
  • Fill out the return form or give us a call to obtain an RMA and return shipping label.
  • There are no returns on the Pentair Colorsync 618031
  • No returns on pool cleaners.
  • No returns on opened seals and o-rings.
  • No returns on capacitors.
  • If a light is returned because it "doesn't work" and it tests fine, the cost to ship and a re-stocking fee will be deducted from the refund.
  • All products denied upon arrival at customers house WILL be charged the cost to ship.
  • Visa Gift Card Promotions: Gift cards are sent within 14 days of the order. When accepting the Visa Gift card, you agree that if your order is returned or refunded, this amount will be deducted from the refunded amount. All Visa Gift cards are sent via email in an E-Gift Card format and are non refundable.
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