Vaillant 3813 AIR Flue Extension 470mm 303902 105260

The Vaillant 3813 Air Flue Extension is a 470mm length designed for use with compatible Vaillant boiler flue systems. This component allows installers to extend the reach of the flue where standard kits are not sufficient for the installation layout.

Typically installed in new build or retrofit projects, this extension piece enables flue runs to be adapted around obstacles or to reach exterior walls or roofs. Straightforward push-fit connection is intended for quick fitting on site as part of a flue system assembly.