Brand New Vaillant Telescopic Horizontal Flue Kit & Elbow 100mm 0020219518. Genuine Vaillant Part Not a cheap Chinese make. This part fits in following Boilers. Vaillant ErP boiler ranges and conveniently allows gas created during the combustion process to be safely dispersed. Suitable for Vaillant ErP Boiler ranges. Thank you for Shopping With us! Check out my other items! Be sure to add me to your favourites list!