Pentair Challenger/SuperFlo/SuperMax Diffuser Quad O-Ring | 355030Z
Pentair
SKU: PEN355030Z
Pentair 355030Z – High-Flow Diffuser O-Ring (Square Cross-Section)
Product Overview
This OEM diffuser O-ring is designed for high-flow pump models and fits select Pentair and Sta-Rite inground pool pumps. It features a square cross-section seal designed for durability under high flow and pressure conditions.
Key Features
- Square cross-section O-ring — thicker profile for enhanced sealing under high flow.
- Fits major pump models including Challenger®, Pinnacle High Flow, SuperFlo®, SuperMax® and others.
- Essential replacement part to restore the diffuser seal and prevent leakage or performance loss.
- Durable elastomer material selected for chemical resistance and long life in pool environments.
Technical Specifications
- Part Number: 355030Z
- Approximate Dimensions: Outside Diameter ~3-1/8″, Inside Diameter ~2-3/4″, Cross Section ~3/16″ thick
- Shape: Square cross-section “ring” style (not a standard round O-ring)
- Compatible with: Select Pentair/Sta-Rite high-flow inground pump models
Installation & Fit-Up Notes
- Turn off power to the pump and relieve system pressure before servicing.
- Remove the pump wet-end or diffuser assembly to access the existing O-ring.
- Clean both mating surfaces thoroughly to ensure the new O-ring seats properly.
- Install the 355030Z O-ring in its groove, ensuring no twists or kinks.
- Re-assemble the diffuser and pump housing, restore power, and check for leaks and proper flow.
Troubleshooting & Maintenance Tips
- Leak between diffuser and housing: Confirm the O-ring is fully seated, and mating surfaces are clean and undamaged.
- Reduced pump flow or pressure fluctuations: A degraded or missing diffuser seal can cause bypass or inefficient flow—replace the O-ring if worn.
- O-ring deformation or chemical damage: Inspect annually; replace at first signs of flattening, cracking or chemical swelling.
Maintenance Tip
During pump service or annual inspection, remove and inspect this O-ring. If the seal shows wear or the pump is reassembled, replacing the diffuser O-ring proactively can prevent leaks and prolong the life of your pump’s hydraulic system.
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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