This product has been discontinued with no replacement. The flue is a vent which allows the safe removal of steam and combusted gases resulting from the boilers normal operation. There are different types of flue which are dependant on the location of the appliance in the building and what model of unit is fit
Fits multiple appliances
Technical specification
Toilet Cistern CapacityFTW--Supplier Part Number5107284Brand NamePotterton