Grant Flue Seal Red Vortex 26-70Kw Fks63

95mm

Grant Red Flue Seal – FKS63
The Grant FKS63 is a genuine red flue seal used in Grant Vortex oil boilers rated 26–70kW. Designed for use in the inner duct of balanced flue systems, this high-temperature elastomer seal creates a secure, gas-tight connection between flue components, ensuring safe and efficient boiler operation. It prevents the escape of combustion gases, supports consistent draft conditions, and helps maintain proper exhaust of flue products.

• OEM Grant UK part – FKS63

• Red, high-temperature-resistant elastomer seal

• Used in inner flue duct of balanced flue systems

• Maintains airtight seal to prevent gas leakage

• Suitable for high-output condensing oil boilers

• Improves safety, combustion efficiency, and flue integrity

• Pre-formed for easy push-fit installation

Compatible Grant Boiler Models

• Grant Vortex Utility 26–70kW

• Grant Vortex Pro Utility 26–70kW

• Grant Vortex External 26–70kW

• Grant Vortex Boiler House 26–70kW

• All Grant Vortex boilers using flue kits rated 26–70kW

When to Replace the Flue Seal

• Seal is cracked, brittle, or heat-damaged

• Flue has been extended, serviced, or reassembled

• Evidence of staining, leaks, or combustion smells

• As part of routine flue system maintenance

Technical Specifications

• Part Number: FKS63

• Manufacturer: Grant UK

• Seal Type: Red high-temperature flue seal

• Material: Flue gas- and heat-resistant elastomer

• Application: Inner duct of Grant balanced flue kits

• Temperature Rating: Suitable for condensing oil boiler flue gas temps

• Installation: Push-fit into duct groove or collar

This flue seal is essential for maintaining compliance with safety regulations and protecting your boiler from efficiency loss or flue gas leaks. Supplied as a genuine Grant part from Heating-Parts.co.uk – the trusted source for specialist boiler spares.