Pentair 355331Z Challenger Diffuser O-Ring - OEM Replacement

OEM replacement diffuser o-ring engineered to provide a reliable watertight seal for Pentair pump diffusers. This genuine Pentair part number 355331Z delivers the correct fit and material compatibility needed for long lasting service in pool and spa environments.

• Compatible with
• Challenger high flow pump
• Challenger high pressure pump
• SuperFlo variable speed pumps manufactured before November 2020
• SuperFlo variable speed pumps manufactured after October 2020
• SuperMax variable speed pumps manufactured before November 2020
• SuperMax variable speed pumps manufactured after October 2020
• Waterfall specialty pump

Key features

• Genuine Pentair OEM replacement part for exact fit and performance
• Durable elastomer material selected for resistance to pool chemicals and heat
• Ensures proper diffuser sealing to maintain pump efficiency and prevent leaks
• Easy to install during routine pump maintenance

Installation tips

• Clean sealing surfaces before installing the new o-ring
• Use a silicone based lubricant that is safe for o-rings to ease installation and reduce pinching
• Inspect diffuser and housing for wear whenever replacing the o-ring

Notes

• Confirm compatibility by checking pump model and manufacturing date stamped on the pump housing
• Sold as a single replacement o-ring for diffuser sealing when performing pump service

If you are unsure about fitment contact our support team with your pump model and serial number and we will verify compatibility.