The original Grundfos replacement O-ring (part number 98148761) is designed for sealing MAGNA3 series pumps. This is a genuine Grundfos part ensuring precise dimensional and material specifications identical to the factory version. Using the original seal guarantees reliable sealing of the hydraulic section of the pump and a long service life for the entire unit.

The O-ring is fitted during servicing or repair of MAGNA3 pumps – typically when removing the pump head from the housing, replacing the rotor, or during routine maintenance. It is always recommended to replace the O-ring whenever the pump is opened to ensure reliable sealing after reassembly.

Features and benefits

• Genuine Grundfos replacement part – guaranteed match of dimensions and material with the original part
• Compatible with the full range of MAGNA3 F series pumps (DN 40–100 diameters)
• EPDM material – resistant to temperature fluctuations and chemical influences in heating systems
• Minimises the risk of medium leakage and system downtime
• Available as part of the premium Grundfos Original Spare Parts service programme
• Grundfos spare parts are generally available for a further 10 years after pump production has ended