There are two types of twin flue adapters; the first is a two piece item, while the other is of monoblock construction. The main difference between them is that with the first type it is installed in two steps. The base is first screwed to the top of the boiler, then the top, which houses the inlet/outlet connections is fixed to the base by means of a special clamp which ensures a leak-proof seal. The second type ‘monoblock’ is secured to the boiler by means of four screws, which pass through holes in the monoblock and clamp it in place on the boiler outlet.
Both types can be supplied with flue gas test points and condensate collector. They are available with either male or female inlet/outlet connections, and can be either painted or unpainted.