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Twin wall: 45 degree wall sleeve (for when going through wall)

Materials always in stock (4 UK-wide depots). This is a twin wall clip-together chimney part used to build a new chimney. Twin wall clip-together chimney can be as close as 5-7cm to combustible materials (so is also useful for adding atop a stove to bypass a wooden beam).

Slide through the wall and cut to length as required. Add mortar around outside of it or Rockwool insulation. Make sure it is Rockwool (some other brands not fireproof).

Diameter of 5" sleeve: 9"

Diameter of 6" sleeve: 10"

Stove Fitter's Warehouse offers a full Twin Wall Design Service with all designs prepared within our Twin Wall Design Studio. Contact us for further details (info@stovefitterswarehouse.co.uk).


Duraflue Twin Wall was launched to the market during 2014 and, due to its high quality and innovative design, is already a favourite amongst professional stove fitters.

Top tip: No fire cement or glue of any kind is used when connecting twin wall pipe to twin wall pipe - it is just push-fit (with a locking band for added security). When to use fire cement on flue joints? Use the SEARCH function and type "sealing flue joints".
Colour & Internal Diameter
Silver 5"
Silver 6"

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Good Service, helpful team!
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stove fitting made easy