The Vaillant rubber funnel part is located around the flue section. The flue is a vent which facilitates the safe removal of steam and noxious gases resulting from the boiler's normal operation. There are various types of flue which are dependent on the location of the appliance.
Fits multiple appliances
Technical specification
Waist Sizeab58cg94gxSupplier Part Number210981Brand NameVaillant