Double storey straight up internal flue system with offset 6 Inch PC

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Please note you are purchasing a full Twin Wall set. This set can be returned but individual parts/items from the set CANNOT be returned. We do not except returns and offer refunds for parts/items that are part of Twin Wall sets.

This set creates approx. 4,5m stack measured from the stove up with an offset of 131mm. If you work out the measurement B+C+D+E+F+G in meters this will tell you how many meters of twin wall you will require.

You may increase the height of the system by adding more straight lengths to the pack.
You will find a detailed list of items in this set in SPECIFICATIONS tab.

This twin wall insulated flue system has been designed for a double storey straight flue with an offset. In this system the Twin wall adapter can connect directly to the stove collar or a short piece of stove pipe (not included) which starts the system. The flue passes through 2 floor levels and all the firestop kits and finishing plates are provided accordingly. Once the straight flue passes in to the loft it goes through the roof level supported by an adjustable roof support and terminates through the roof, passing through an adjustable flashing and finishing off with a rain cap terminal. The offsets can be used anywhere suitable within the system to create the optimum termination for the flue, in most cases this is in the loft space purely for aesthetics. Please see our offset chart for more information.

If you wish to ask any questions or if you would like us to work out your twin wall system for you then please just e mail pictures or a rough sketch and measurements to us. We offer a completely free no obligation flue design and quote service.


G70 when in an enclosure and G50 when not enclosed.


Custom Fields
Increasing/Standard adapterx1
Weathering rain capx1
Pipe length 1000mmx6
Pipe length 500mmx1
Pipe length 250mmx1
Narrow locking bandx11
Firestop Masking Platex1
Fire-stop setx1
Roof supportx1
NU-LEAD roof flashingx1
Bend 45 degreesx2
Storm Collarx1

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