5 Inch (125mm) Silver Twin Wall Flue

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  1. 135 Degree Long Adjustable Branch Twin Wall Tee Piece in Stainless Steel - 125mm

    Key Features:

    A 135 degree long adjustable branch tee piece is used when the flue is passing through the wall at a 45 degree angle, it turns the flue pipe from 45 degree to vertical with an access hatch at the bottom for sweeping the flue system. Supplied with a locking band. Learn More
    Special Price £275.96 Regular Price £358.75
    • In Stock | 48 Hour Delivery
  2. 135 Degree Long Branch Twin Wall Tee Piece in Stainless Steel - 125mm

    Key Features:

    A 135 degree long branch tee piece is used when the flue is passing through the wall at a 45 degree angle, it turns the flue pipe from 45 degree to vertical with an access hatch at the bottom for sweeping the flue system. Supplied with a locking band. Learn More
    Special Price £248.86 Regular Price £323.52
    • In Stock | 48 Hour Delivery
  3. 135 Degree Twin Wall Tee Piece in Stainless Steel - 125mm

    Key Features:

    A 135 degree tee piece is used when the flue is passing through the wall at a 45 degree angle, it turns the flue pipe from 45 degree to vertical with an access hatch at the bottom for sweeping the flue system. Supplied with a locking band. Learn More
    Special Price £148.50 Regular Price £193.05
    • In Stock | 48 Hour Delivery
  4. Twin Wall Ventilated Firestop Support Set in Stainless Steel - 125mm

    Key Features:

    A ventilated firestop support set used to support the flue and maintain ventilation where it passes through a ceiling or floor. Learn More
    Special Price £138.83 Regular Price £180.48
    • In Stock | 48 Hour Delivery
  5. Twin to Single Wall Starter Length (125mm Single Wall) in Stainless Steel - 125mm

    Key Features:

    A twin wall starter length used to connect the twin wall flue system to the single wall flue pipe (125mm) coming from the appliance. Supplied with a locking band. Learn More
    Special Price £137.53 Regular Price £178.79
    • In Stock | 48 Hour Delivery
  6. 590mm - 1005mm Adjustable Twin Wall Flue Pipe in Stainless Steel - 125mm

    Key Features:

    This is an adjustable length of twin wall insulated flue pipe meaning it can be any length from 590mm - 1005mm it is used to extend the height of a flue system. Supplied with a locking band. Learn More
    Special Price £128.66 Regular Price £167.26
    • In Stock | 48 Hour Delivery
  7. Twin Wall Base Support Unit With Brackets in Stainless Steel - 125mm

    Key Features:

    A base support is used to provide support at the base of an external flue system. Learn More
    Special Price £124.56 Regular Price £161.93
    • In Stock | 48 Hour Delivery
  8. 500mm Twin to Single Wall Starter Length (125mm Single Wall) in Stainless Steel - 125mm

    Key Features:

    A 500mm twin wall starter length used to connect the twin wall flue system to the single wall flue pipe (125mm) coming from the appliance. Supplied with a locking band. Learn More
    Special Price £108.49 Regular Price £141.04
    • In Stock | 48 Hour Delivery
  9. 90 Degree Twin Wall Tee Piece in Stainless Steel - 125mm

    Key Features:

    A 90 degree tee piece is used when the flue passes horizontally through the wall, it turns the flue pipe from horizontal to vertical with an access hatch at the bottom for sweeping the flue system. Supplied with a locking band. Learn More
    Special Price £106.78 Regular Price £138.81
    • In Stock | 48 Hour Delivery
  10. 380mm - 585mm Adjustable Twin Wall Flue Pipe in Stainless Steel - 125mm

    Key Features:

    This is an adjustable length of twin wall insulated flue pipe meaning it can be any length from 380mm - 585mm it is used to extend the height of a flue system. Supplied with a locking band. Learn More
    Special Price £99.60 Regular Price £129.48
    • In Stock | 48 Hour Delivery
  11. 1000mm Twin Wall Flue Pipe in Stainless Steel - 125mm

    Key Features:

    This 1000mm twin wall insulated flue pipe is used to extend the height of a flue system by 1000mm. Supplied with a locking band. Learn More
    Special Price £90.44 Regular Price £117.57
    • In Stock | 48 Hour Delivery
  12. Twin Wall Eurocowl Anti Down Draught Cowl in Stainless Steel - 125mm

    Key Features:

    An anti down draught cowl fitted to the end of the flue system to help prevent down draught and rain entering the flue system. Supplied with a locking band. Learn More
    Special Price £77.10 Regular Price £100.23
    • In Stock | 48 Hour Delivery
  13. Flex Liner (Below) to Twin Wall Adaptor in Stainless Steel - 125mm

    Key Features:

    Used to connect a flexible flue liner (below) to twin wall insulated flue pipe (above). Supplied with a locking band. Learn More
    Special Price £74.03 Regular Price £96.24
    • In Stock | 48 Hour Delivery
  14. Twin Wall Guy Wire Bracket in Stainless Steel - 125mm

    Key Features:

    A guy wire bracket is used to brace a tall flue that extends above the roof line with guy wires. Learn More
    Special Price £73.43 Regular Price £95.46
    • In Stock | 48 Hour Delivery
  15. 30 Degree Twin Wall Elbow Bend in Stainless Steel - 125mm

    Key Features:

    Used to create a bend of 30 degrees in a twin wall insulated flue system. Supplied with a locking band. Learn More
    Special Price £69.86 Regular Price £90.82
    • In Stock | 48 Hour Delivery
  16. 500mm Twin Wall Flue Pipe in Stainless Steel - 125mm

    Key Features:

    This 500mm twin wall insulated flue pipe is used to extend the height of a flue system by 500mm. Supplied with a locking band. Learn More
    Special Price £68.95 Regular Price £89.64
    • In Stock | 48 Hour Delivery
  17. 15 Degree Twin Wall Elbow Bend in Stainless Steel - 125mm

    Key Features:

    Used to create a bend of 15 degrees in a twin wall insulated flue system. Supplied with a locking band. Learn More
    Special Price £68.28 Regular Price £88.76
    • In Stock | 48 Hour Delivery
  18. 225mm - 385mm Twin Wall Flat Adjustable Wall Support in Stainless Steel - 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 225mm - 385mm away from the wall. Learn More
    Special Price £68.20 Regular Price £88.66
    • In Stock | 48 Hour Delivery

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5 Inch Twin Wall Flue Systems

Our 5 inch twin wall flue systems allow you to install a stove safely in properties without an existing chimney. The double-walled design ensures exhaust gases are expelled efficiently while keeping the outer surface cooler, making them suitable for both single and multi-storey installations.

Why Do You Need a 5 Inch Twin Wall Flue?

  • Safe operation – double insulation protects against high surface temperatures
  • Compliance – designed to meet UK building regulations for stoves without a chimney
  • Flexible installation – works for straight or angled flue runs, including multi-storey setups
  • Durable materials – crafted from high-quality stainless steel for long-lasting performance

Components and Accessories

Alongside the 5 inch flue pipes, we stock all the parts you need to complete your installation:

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

Before You Choose

5 inch twin wall flues are primarily required for homes without a chimney or where your stove will be outside an existing flue. Check your stove type, property layout, and local building regulations. Professional installation by a HETAS-qualified engineer is strongly recommended.

Explore Our Range

Browse our 5 inch twin wall flue pipes and accessories to find everything needed for a compliant, safe installation. For guidance, see our stove installation guide or contact 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)