Chimney inner sleeve WADEX 125 mm diameter

WADEX chimney inner sleeve with 125 mm internal diameter is a metal flue liner designed for relining and repairing chimneys and exhaust systems. The sleeve creates a smooth, consistent passage for combustion gases, helps maintain draft stability and shields masonry from corrosive condensates and soot. Intended for use with residential heating appliances and solid-fuel stoves, this sleeve is suitable for retrofit and maintenance projects where restoring safe and efficient flue performance is required.

Advantages

The metal construction offers mechanical strength and resistance to abrasion from soot and particulates. A uniform 125 mm internal diameter ensures predictable airflow characteristics and compatibility with many flue-connected appliances. By providing a continuous, non-porous interior surface the sleeve reduces the risk of gas leakage into the chimney structure and limits corrosive interaction between exhaust condensates and masonry. Installation can be performed without complete chimney rebuilding, reducing intervention time and cost during repairs.

Suitable for

• Relining existing chimneys for solid-fuel stoves and boilers
• Repairing damaged or eroded flue passages in residential chimneys
• Improving draft and exhaust flow in retrofit heating installations
• Protecting masonry from corrosive byproducts and condensate

Key specifications

• Internal diameter: 125 mm
• Material: metal flue sleeve (steel)
• Intended application: chimney lining and flue repair
• Suitable for use with solid-fuel appliances and residential heating systems
• Provides smooth internal surface for exhaust gases

How to use

Measure the existing chimney or flue to confirm suitability for a 125 mm internal diameter sleeve. Prepare the chimney by removing loose debris, soot and any damaged material that could obstruct the liner. Insert the sleeve into the chimney from the top or bottom according to the chosen installation method, ensuring a continuous run to the appliance connection point. Secure and seal joints as required to provide a gas-tight lining and maintain proper alignment for the appliance flue collar. After installation check draft and appliance operation, and perform any necessary finishing work at the flue connection and chimney top.

Usage recommendations

Use the sleeve with compatible appliance flue collars and maintain clearance requirements specified by the appliance manufacturer. For safety and compliance consult local building codes; consider professional installation where access is difficult, the chimney is structurally compromised, or where sealed connections and testing are required.