Flue/Gasket Seal Almeva FLEX DN80, model ZUMDF8

Almeva FLEX DN80 gasket (model ZUMDF8) is a replacement sealing element designed for 80 mm ducting and flue systems. The gasket creates a tight joint between DN80 pipe sections in ventilation, stove and chimney flue assemblies. Manufactured to match the dimensions of standard DN80 connections, this flexible seal supports correct alignment and reduces air and smoke leakage at pipe joints.

Advantages

The Almeva FLEX DN80 gasket is flexible and resilient, allowing for easy installation and repeated disassembly without loss of sealing performance. Its material composition provides good compressibility for even contact across the joint, helping to prevent drafts and minimise soot or smoke escape. The gasket is compatible with metal and flexible ducts of the same nominal diameter and contributes to reliable, low-maintenance operation of flue and ventilation systems.

Suitable for

• Sealing joints in DN80 ventilation ducts
• Sealing stove and chimney flue connections with 80 mm diameter
• Replacement of worn or damaged gaskets in flue assemblies
• Use in both rigid metal and flexible ducting installations

Key specifications

• Nominal diameter: 80 mm (DN80)
• Design: flexible gasket for circular duct connections
• Function: static sealing between pipe sections to reduce leaks and drafts
• Compatibility: intended for standard DN80 flue and ventilation components
• Operational focus: sealing for air, smoke and flue gas pathways in stove and ventilation systems

How to use

Ensure both pipe ends are clean and free of debris before fitting the Almeva FLEX DN80 gasket. Position the gasket evenly around the pipe end or inside the socket so that it forms a continuous sealing surface when the mating section is inserted. Insert the connecting pipe section and align the joint; secure according to the duct or flue manufacturer's instructions. Inspect the assembled joint for even compression of the gasket and correct alignment to ensure a reliable seal.

Usage recommendations

For best results, replace gaskets that show visible wear, deformation or cracking. Avoid exposing the gasket to aggressive chemicals or mechanical damage during installation. When used in chimney or stove flues, verify that the gasket material is suitable for the maximum operating temperatures of your system and follow local safety and ventilation regulations.