The Baxi 248021 O-Ring (17.86 x 2.62 mm) is a genuine Baxi replacement sealing component designed to create a reliable, leak-resistant joint in compatible boiler systems. Made from durable, heat- and pressure-resistant material, this O-ring helps maintain a tight seal between mating parts where precise compression is required, supporting stable system pressure and preventing unwanted water leaks. It is intended to be fitted by a qualified heating engineer during servicing, maintenance, or when replacing worn or deteriorated seals.

Compatibility for the 248021 O-ring includes Baxi Duo Tec, Combi, and Megaflo boiler models that utilise this specific 17.86 x 2.62 mm seal size. Always confirm your boiler’s exact model and part requirements before installation to ensure correct fit and reliable performance.

Using a genuine Baxi O-ring helps support efficient and safe operation of your central heating and hot water system and contributes to the long-term reliability of your boiler installation.