The Worcester Bosch 87102050970 CDi Set of O-Rings is a genuine replacement sealing kit designed to provide reliable, durable sealing for multiple connection points within CDi series boilers. O-rings create flexible, watertight and airtight seals at pipe joints, flanges and component interfaces to prevent leaks, maintain correct pressures and protect internal parts from moisture ingress. Over time, O-rings can harden, crack or deform, leading to leaks, pressure loss or fault codes, so replacing them with the correct OEM set helps restore dependable sealing integrity.

This O-ring set is compatible with Worcester Bosch CDi boilers that reference part number 87102050970 in their technical documentation. To ensure correct fitment and effective sealing performance, always verify that the part number matches your existing O-rings or consult your boiler’s service information before installation, as sealing component sizes and quantities vary between models.

Supplied as a complete set of genuine Worcester Bosch O-rings, the 87102050970 CDi Set of O-Rings includes the seized or worn seals needed for designated joints and assemblies within the boiler. Installed by a qualified engineer, this set helps restore proper sealing, supports stable pressures and contributes to reliable central heating and hot-water performance in compatible CDi boilers.