The Vaillant 981103 is a genuine OEM sealing ring designed to provide secure, airtight, and watertight sealing between key hydraulic or combustion components in compatible Vaillant boilers. This high-quality rubber seal ensures correct system pressure, prevents leaks, and supports the safe, efficient operation of the appliance.

Over time, seals can harden, flatten, or deteriorate due to heat and pressure. Replacing worn or damaged sealing rings with genuine Vaillant components helps maintain system integrity and prevent operational issues such as leaks, pressure drops, or error codes.

Key Features:

• Genuine Vaillant sealing ring

• Ensures reliable, airtight and watertight connections

• Helps maintain stable system pressure

• Prevents leaks and component wear

• Manufactured to Vaillant’s strict OEM durability standards

• Heat-resistant, high-integrity construction

• Direct-fit replacement for quick professional installation

Compatibility

The Vaillant 981103 Sealing Ring is compatible with:

• Vaillant ecoTEC Plus VUW combi boilers

• Vaillant Ecomax VUW combi boilers

• Vaillant ecoTEC VU system boilers

• Any model listing 981103 in the official Vaillant parts documentation

Engineers should always verify exact compatibility via the boiler’s service manual or parts list.