The Worcester Bosch 87110043240 Seal is a genuine replacement sealing component designed to maintain airtight and watertight joints within your boiler’s internal assemblies. This durable seal prevents gas, water and combustion by-products from escaping at connection points, helping protect internal components from leaks, maintain correct pressures and support safe, efficient operation. A compromised seal can lead to reduced heating performance, pressure loss, system faults or safety lockouts, so fitting the correct OEM seal is essential for dependable boiler performance.

This seal is compatible with Worcester Bosch Ri, Greenstar and ErP series boilers that specify part number 87110043240 in their parts documentation. To ensure proper fitment and reliable performance, always verify the part number on your existing seal or consult your boiler’s service information before installation, as sealing requirements vary between models and system configurations.

Supplied ready for direct replacement, the 87110043240 Seal fits precisely into the designated joint or housing when installed by a qualified engineer, restoring proper sealing integrity and supporting safe, efficient operation in compatible boilers.