Chimney flue inner sleeve WADEX 024100150 for concentric ducts, Ø100/150 mm

The WADEX chimney flue inner sleeve 024100150 is an inner lining component intended for concentric duct systems with inner/outer diameters of 100/150 mm. It functions as the central passage for combustion gases, maintaining the concentric spacing between inner and outer ducts and helping to ensure stable exhaust flow for boilers and heating appliances connected to a concentric flue system.

Advantages

This inner sleeve is made to fit concentric flue assemblies where an inner duct of 100 mm and an outer duct of 150 mm are required, providing a precisely sized internal bore for exhaust gases. Its design supports consistent airflow and contributes to correct alignment inside the concentric system, reducing the risk of flow restrictions. The component simplifies installation and replaces worn or damaged inner liners without altering the outer conduit.

Suitable for

• Concentric flue systems with 100/150 mm inner/outer diameters
• Boilers and heating appliances using concentric vents
• Replacement of damaged or aged inner liners in vent assemblies
• Vent installations requiring maintained concentric spacing for safe exhaust

Key specifications

• Compatible concentric duct inner diameter: 100 mm
• Compatible concentric duct outer diameter: 150 mm
• Function: inner sleeve / inner lining for combustion gas passage
• Application: horizontal or vertical concentric vent runs for heating appliances
• Material characteristics: rigid lining suitable for exhaust gas guidance (manufacturer materials and finish as supplied)

How to use

Install the inner sleeve as part of the concentric flue assembly by inserting it into the corresponding outer duct that matches the 100/150 mm diameters. Ensure the sleeve is fully seated and aligned so the inner passage is concentric within the outer conduit. Follow appliance manufacturer instructions for connection to the boiler or heating device, and verify sealing and mechanical supports to prevent movement during operation. Perform a smoke or draft test where applicable to confirm correct exhaust flow after installation.

Usage recommendations

Use this inner sleeve only in compatible concentric duct systems with matching diameters and within the temperature and pressure limits specified by the heating appliance and flue system manufacturer. Inspect the sleeve periodically for signs of corrosion, deformation or blockage, and replace if damage is found. Always observe local codes and the appliance manufacturer’s service instructions when installing or servicing vent components.