Flex to Twin Adapter – Twin Wall Pipe 175mm (Stainless)

£57.17 Inc VAT

HETAS approved, black and Stainless Twin Wall flue components and associated parts for creating new internal and external flue systems.

Available in 125mm-200mm internal diameters, all insulated parts feature a 25mm layer of Rockwool insulation, creating a 50mm greater outer diameter and come supplied with a Locking Band where applicable.

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Twin wall flue size guide

1. Pipe and elbow diameters

With twin wall flue pipe, the internal and external diameters are different. This is because they have 1 inch of insulation surrounding the inner pipe that makes the outer pipe 2 inches larger than the inner pipe. The diameters referred to always relate to the INTERNAL diameter of the pipes it is this diameter that is important when connecting your flue pipe to a stove.

2. Brackets and finishing plates

Due to the reasons above all brackets and plates that are cut to fit twin wall pipe will actually measure 2 inches more than their stated diameter.

Stated Diameter I = Internal Diamater E = External Diameter Brackets & plate Diameter
100mm (4″) 100mm 150mm 150mm
125mm (5″) 125mm 175mm 175mm
150mm (6″) 150mm 200mm 200mm
175mm (7″) 175mm 225mm 225mm
200mm (8″) 200mm 250mm 250mm

Other useful information regarding twin wall flue systems

  • Your flue system (internal diameter) must never be less than the flue collar diameter on your stove and the stated flue requirements of that stove.
  • You can increase but never decrease the diameter of your flue system.
  • For that reason we do not sell reducers or decreasing components.
  • You should have a maximum of 4 elbows in your system.
  • The maximum angle of a bend permitted is 45 degrees other than coming straight out the back of your stove.
  • You should aim for an overall height of at least 4.5 meters from the top of your stove for the flue to work well.
  • The outlet or terminal of your flue system needs to finish at least 1000mm above your roof or 2,300mm horizontally from your roof, or 600mm above the ridge of your roof, whichever comes first.
  • Need help planning your system? Call us on 01376 315 760 to speak to our HETAS approved team of specialists who can plan your building regulation compliant system with you.

Flex to Twin Adapter – Twin Walled Pipe

Adapter to convert from Flexible Flue Liner up to Twin Wall pipes. Typically required for capped chimneys and used in conjunction with a Console Plate (sold separately).

Designation number T450-N1-D-Vm-L50050-G60.

Available in Stainless finish only, 125mm-200mm internal diameters.

This item features a male Flexible Liner connection on the underside, an insulated twin wall female connection on the top and is not supplied with a locking band.

Please note – As with all twin wall parts the diameter quoted is the internal diameter – The external diameter is 2 inches larger due to the surrounding insulation.

  • Finish: Stainless
  • Inner Diameter: 175mm
  • Outer Diameter: 225mm
  • Connection: Push-Fit
  • Insulated: Yes (25mm Rockwool)
  • Locking Band Included: No
  • Warranty: 12yrs
  • Int / Ext Grade: 316 / 304

Additional information

Colour

Silver

Flue Diameter

175mm

Flue Parts

Adapter

To Fit

Twin wall pipe

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