This Vaillant flue extension is 470mm long and is commonly used in vertical flue installations. It allows you to increase the length of a standard flue pipe, permitting you to have more control over where the plume is released from the property, avoiding neighbouring properties and other unsuitable areas. The flue extension is both quick to install, due to the simple to use push-fit connectors, and aesthetically pleasing, allowing it to blend in with the rest of the boiler system. This flue extension is ideal for use with the ecoMAX/TEC models.