Vaillant Lip Seal Epdm Dn 60 981233

Vaillant Lip Seal Epdm Dn 60 981233

The Vaillant Lip Seal (Part No. 981233) is a critical safety component used within the 60/100mm concentric flue system of Vaillant condensing boilers. Specifically designed as a DN 60 (60mm) internal seal, it sits within the inner flue pipe to ensure an airtight and watertight seal for the products of combustion. Manufactured from high-grade EPDM (Ethylene Propylene Diene Monomer), this seal is engineered to withstand the acidic condensate and high temperatures associated with modern heating appliances.

Key Features and Specifications
Critical Flue Seal: Prevents dangerous combustion gases (flue gases) from leaking out of the inner pipe and entering the air intake or the property.

Material Integrity: The EPDM rubber is UV, ozone, and heat resistant, ensuring it remains flexible and maintains a tight seal throughout the life of the flue system.

DN 60 Specification: Precision-sized for the 60mm diameter inner exhaust duct of standard Vaillant 60/100mm flue kits and extensions.

Genuine Vaillant Part: Essential for maintaining the safety certification and manufacturer's warranty of the flue assembly.

High Heat Resistance: Capable of withstanding the constant thermal expansion and contraction cycles of the boiler's exhaust.

Boiler Compatibility
This lip seal is a universal component for Vaillant's standard 60/100mm flue systems. It is used in the vast majority of wall-hung models, including:

ecoTEC Plus (All Models): 612, 615, 618, 624, 630, 637, 824, 831, 832, 835, 837, 838, 937, 938.

ecoTEC Pro (All Models): 24, 28, 30.

ecoFIT Pure (All Models): 612, 615, 618, 625, 630, 825, 830, 835.

ecoMAX: Older condensing models utilizing the 60/100mm system.

Important Safety Note: Any component related to the flue system must be installed or replaced by a Gas Safe Registered engineer. During an annual service, these seals should be inspected for signs of perishing or damage to ensure the boiler remains safe to operate.

Installation Advice
When installing flue extensions or elbows, it is industry best practice to use a dedicated flue lubricant (silicone-based) on the lip seal. This prevents the seal from being pinched, torn, or dislodged as the pipes are pushed together, ensuring a smooth, airtight connection.

Essential Companion Products
To ensure a complete and compliant flue installation or repair, the following genuine Vaillant parts are recommended:

Specialist Support and Local Collection
Are you performing a flue integrity test or extending a flue run? Our trade counter team can help you identify all the necessary seals, brackets, and extensions required for your specific configuration.

Visit our trade counter and Bathroom Showroom at 61 Fullers Road, E18 2QB for expert technical advice and quick access to the full Vaillant flue range.