5 Inch (125mm) Black Twin Wall Flue

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  1. Narrow Twin Wall Locking Band in Matt Black - 125mm

    Key Features:

    The narrow locking band is designed to connect straight lengths of twin wall pipe together. Learn More
    Special Price £27.27 Regular Price £35.45
    • In Stock | 48 Hour Delivery
  2. Twin Wall Round 2-Part Flat Finishing Plate in Matt Black - 125mm

    Key Features:

    A two part round flat finishing plate used to give a neat finish where the flue passes through a ceiling or wall. Learn More
    Special Price £36.22 Regular Price £47.09
    • In Stock | 48 Hour Delivery
  3. Wide Twin Wall Locking Band in Matt Black - 125mm

    Key Features:

    The wide locking band is designed to connect twin wall parts other than straight lengths together such as twin wall bends. Learn More
    Special Price £38.31 Regular Price £49.80
    • In Stock | 48 Hour Delivery
  4. 45 Degree Twin Wall Oval 2-Part Finishing Plate in Matt Black - 125mm

    Key Features:

    A two part oval finishing plate used to give a neat finish where the flue passes through a ceiling or wall at 45 degrees. Learn More
    Special Price £38.56 Regular Price £50.13
    • In Stock | 48 Hour Delivery
  5. Twin Wall Storm Collar in Matt Black - 125mm

    Key Features:

    Our twin wall storm collar is used to ensure that the area where the flue passes through the roof / flashing is kept watertight. Learn More
    Special Price £42.88 Regular Price £55.74
    • In Stock | 48 Hour Delivery
  6. 45 Degree Twin Wall 1-Piece Finishing Plate in Matt Black - 125mm

    Key Features:

    A one piece finishing plate used to give a neat finish where the flue passes through a ceiling or wall at 45 degrees. Learn More
    Special Price £44.99 Regular Price £58.49
    • In Stock | 48 Hour Delivery
  7. 0 Degree Twin Wall 1-Piece Finishing Plate in Matt Black - 125mm

    Key Features:

    A one piece finishing plate used to give a neat finish where the flue passes through a flat ceiling. Learn More
    Special Price £44.99 Regular Price £58.49
    • In Stock | 48 Hour Delivery
  8. Single to Twin Wall Adaptor (125mm Single Wall) in Matt Black - 125mm

    Key Features:

    Used to convert your 125mm single wall vitreous flue pipe to twin wall insulated flue pipe. Supplied with a locking band. Learn More
    Special Price £51.37 Regular Price £66.78
    • In Stock | 48 Hour Delivery
  9. 30-45 Degree Twin Wall Square 2-Part Finishing Plate in Matt Black - 125mm

    Key Features:

    A two part square finishing plate used to give a neat finish where the flue passes through a ceiling or wall at 30-45 degrees. Learn More
    Special Price £51.60 Regular Price £67.08
    • In Stock | 48 Hour Delivery
  10. 0-30 Degree Twin Wall Square 2-Part Finishing Plate in Matt Black - 125mm

    Key Features:

    A two part square finishing plate used to give a neat finish where the flue passes through a ceiling or wall at 0-30 degrees. Learn More
    Special Price £51.60 Regular Price £67.08
    • In Stock | 48 Hour Delivery
  11. Twin Wall Conical Adaptor (125mm) in Matt Black - 125mm

    Key Features:

    A conical adaptor used to connect a 125mm appliance outlet to twin wall insulated flue pipe. Supplied with a locking band. Learn More
    Special Price £57.06 Regular Price £74.18
    • In Stock | 48 Hour Delivery
  12. 250mm Twin Wall Flue Pipe in Matt Black - 125mm

    Key Features:

    This 250mm twin wall insulated flue pipe is used to extend the height of a flue system by 250mm. Supplied with a locking band. Learn More
    Special Price £58.76 Regular Price £76.39
    • In Stock | 48 Hour Delivery
  13. Twin Wall Soot Collector with Drain in Matt Black - 125mm

    Key Features:

    Our Soot Collector with Drain is used in conjunction with the T-pieces to close off the flue system and provides a drain point. Learn More
    Special Price £62.74 Regular Price £81.56
    • In Stock | 48 Hour Delivery
  14. Twin Wall Flat Wall Support in Matt Black - 125mm

    Key Features:

    Used to support the weight of the twin wall flue system on a flat wall. Learn More
    Special Price £63.39 Regular Price £82.41
    • In Stock | 48 Hour Delivery
  15. Twin Wall Firestop Masking Plate in Matt Black - 125mm

    Key Features:

    A masking plate used to give a neat finish to the underside of a fire stop plate. Learn More
    Special Price £67.30 Regular Price £87.49
    • In Stock | 48 Hour Delivery
  16. Twin Wall Weathering Cap in Matt Black - 125mm

    Key Features:

    A weathering cap is used at the end of a flue system it helps to prevent down draught and rain entering the flue system. Supplied with a locking band. Learn More
    Special Price £68.65 Regular Price £89.24
    • In Stock | 48 Hour Delivery
  17. Twin Wall Rain Cap in Matt Black - 125mm

    Key Features:

    A rain cap is used at the end of a flue system it helps to prevent rain entering the flue system. Supplied with a locking band. Learn More
    Special Price £69.71 Regular Price £90.62
    • In Stock | 48 Hour Delivery
  18. 95mm - 135mm Twin Wall Flat Adjustable Wall Support in Matt Black - 125mm

    Key Features:

    Used to connect twin wall flue pipe to the wall. The bracket can be placed anywhere on a length of pipe, except for on the joints. The support allows the pipe to be fitted 95mm - 135mm away from the wall. Learn More
    Special Price £71.51 Regular Price £92.96
    • In Stock | 48 Hour Delivery

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5 Inch Black Powder-Coated Twin Wall Flue Systems

Our 5 inch black powder-coated twin wall flue systems are perfect for installing a stove in homes without an existing chimney. The double-walled design efficiently channels exhaust gases while keeping the exterior cooler, making them suitable for both single-storey and multi-storey installations.

Why Do You Need a 5 Inch Black Twin Wall Flue?

  • Safe operation – double insulation reduces surface temperatures for safer handling
  • Regulation compliant – meets UK building regulations for stoves installed without a chimney
  • Flexible installation – works with straight or angled flue runs, including multi-storey setups
  • Durable design – black powder-coated stainless steel for a long-lasting finish

Components and Accessories

Alongside the 5 inch black flue pipes, we supply all the components required for a complete installation:

  • Adaptors, bends, and T-pieces
  • Locking bands, brackets, and finishing plates
  • Top caps and rain cowls for added protection and draft control

Before You Choose

5 inch twin wall flues are primarily needed for properties without an existing chimney or where the stove sits outside a current flue. Always check your stove type, property layout, and local building regulations. Installation by a HETAS-qualified engineer is strongly recommended for safety and compliance.

Explore Our Range

Browse our black powder-coated 5 inch twin wall flue pipes and accessories for everything required for a compliant and safe stove installation. For guidance, see our stove installation guide or speak to our HETAS-trained team on 0161 376 4191.

Visit our Showrooms

Explore our full range of wood burning stoves, BBQs, grills and outdoor heating at our showrooms.

Cheadle

Stanley Green Retail Park, 
Earl Rd, Cheadle
SK8 6PT

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Stockport

137 Wellington Road North
Stockport, Cheshire
SK4 2PF

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Bromsgrove

15 Sherwood Rd
Bromsgrove
B60 3DR

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Package includes: 

Woodford Carrington 5 Multifuel Stove (Ideal Home Award winner), Flue liner Pack (flue liner, adapter, chimney cap), Fitting Kit (stove pipe, register plate, carbon monoxide detector) Full Installation (by a HETAS registered installer)