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.
