The Twin Wall to Twin Wall Increasing Adapter allows a secure connection between any twin walled pipes of different diameters for Shieldmaster twin wall only.
Shieldmaster twin wall flue is CE approved for use in the UK, designation number EN:1856-1 T450 N1 D Vm L50050 G60.
Please note, this item comes supplied with a locking band only in the lesser diameter and will increase the internal diameter of your flue system by one inch.

Shieldmaster twin wall flue pipe is precision made to achieve a smaller distance to combustible materials than many other pipes on the market. At just 60mm minimum clearance to combustibles and a 25 year warranty this brand of twin wall pipe really does the job well and is built to last. With its unique push fit system it easily locks with an included band without the need for any sealant or adhesives at the joins.
Shieldmaster flue products come with a 25-year warranty covering manufacturing defects, provided the system is installed and used in accordance with the supplied installation instructions. To maintain warranty validity, the flue must be professionally swept at least once a year by an approved chimney sweep, with a signed service record kept. When burning solid fuels, only those approved by HETAS or the Solid Fuel Association are permitted. Use of unapproved fuels or any indication of a chimney fire will void the warranty. For coloured flue pipes with a powder-coated finish, the surface coating is covered by a separate 2-year warranty.
Shieldmaster Twin Wall Flue Systems Brochure
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