Twin Wall Flue & Single Wall Flue Commercial
Flue Direct is the UK's main supplier of stainless steel multi fuel insulated twin wall flue pipe, selling premium quality HETAS approved twin wall chimney flue in all diameters at the best prices. Our dedicated team of advisors can also provide you with FREE design advice for your twin wall flue system to make sure you have all the parts you need for your flue installation. If you need help with how to install a twin wall flue system you can refer to our FAQ's section or contact us for further advice. We always advise using a HETAS approved installer and to have you chimneys swept by a qualified chimney sweep every 12 months.
We offer unbeatable prices on our twin wall chimney flue which is available in stainless steel or black finish (interchangeable) with a Price Match Promise that if you find a like for like system we guarantee to beat the price. We supply Dinak DW and KC twin wall flue which comes with a 10 year Warranty and have been using this top quality product for years.
We are dedicated to providing a fast and reliable delivery service throughout the UK on all orders, with orders placed before 12.30pm being processed the same day. If you spend over £150 you will receive FREE DELIVERY.
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6" inch Boiler Adaptor (100)
Product Code: 100150SW6
RRP: £43.68Excl. Tax: £17.98 Incl. Tax: £21.58 -
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6" inch flexible liner adaptor to twin wall flue (671)
Product Code: 2-150-101_cp1
RRP: £142.74Excl. Tax: £45.68 Incl. Tax: £54.82 -
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8" inch Twin wall/Single wall Connection (16Q) (Twin wall at the bottom single wall at the top)
Product Code: 16Q200SW
RRP: £96.72Excl. Tax: £46.29 Incl. Tax: £55.55 -
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Twin wall/Single wall Connection (16Q) (Twin wall at the bottom single wall at the top)
Product Code: 16Q80SW6
RRP: £73.84Excl. Tax: £35.05 Incl. Tax: £42.06 -
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7" inch Twin wall Connection from single wall flue (105)
Product Code: 105180SW6
RRP: £78.00Excl. Tax: £31.96 Incl. Tax: £38.35 -
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7" inch Reducer/Increaser (026) 150mm at the bottom to 180mm at top)
Product Code: 026180SW6
RRP: £124.80Excl. Tax: £62.59 Incl. Tax: £75.11 -
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14" inch Boiler Adaptor Condensing (1C0)
Product Code: 1C0350SW
RRP: £168.48Excl. Tax: £71.15 Incl. Tax: £85.38 -
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5" inch Stove Adaptor Increaser from 4" to 5" 130mm twin wall flue (A17)
Product Code: A17100DW
RRP: £66.63Excl. Tax: £42.32 Incl. Tax: £50.78 -
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4" inch Boiler Adaptor (100)
Product Code: 100130SW6
RRP: £37.44Excl. Tax: £15.84 Incl. Tax: £19.01 -
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14" inch DW/SW Adapter (16Q)
Product Code: 03013516QDW
RRP: £137.37Excl. Tax: £69.17 Incl. Tax: £83.00 -
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12" inch Excentric (flat bottom) reducer / increaser (026E) 250mm bottom - 300mm top - single wall flue
Product Code: 026E300SW6
RRP: £337.71Excl. Tax: £174.89 Incl. Tax: £209.87 -
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14" inch Twin wall reducer (026) - 350mm to 300mm
Product Code: 0601G5026DW2
RRP: £334.75Excl. Tax: £156.87 Incl. Tax: £188.24 -
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8" inch Twin Wall Pipe 270mm (025)
Product Code: 030120025DW2
RRP: £80.78Excl. Tax: £44.51 Incl. Tax: £53.41 -
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14" inch Twin Wall Long Adjustable Pipe 530-880 (022)
Product Code: 030135022DWJ
RRP: £397.78Excl. Tax: £197.32 Incl. Tax: £236.78 -
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6" inch Twin Wall Starter Length 940mm (147)
Product Code: 030115147DE--cpy
RRP: £168.37Excl. Tax: £85.77 Incl. Tax: £102.92 -
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10" inch Twin Wall Inspection Length 440mm (052)
Product Code: 030125052DW
RRP: £349.02Excl. Tax: £219.99 Incl. Tax: £263.99 -
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14" inch Adjustable Length 65-373mm (022)
Product Code: 0691035022FK
RRP: £226.60Excl. Tax: £135.10 Incl. Tax: £162.12 -
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12" inch Length 425mm (024)
Product Code: 0691030024FK
RRP: £105.28Excl. Tax: £49.61 Incl. Tax: £59.53 -
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4" inch Length 260mm (025)
Product Code: 0691010025FK
RRP: £21.64Excl. Tax: £12.04 Incl. Tax: £14.45 -
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5" inch Twin Wall length with drain
Product Code: 030113055DW
RRP: £140.46Excl. Tax: £61.80 Incl. Tax: £74.16 -
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5" inch Twin Wall flue Long Adjustable Pipe 530-880mm (022)
Product Code: 030113022DWJ--cpy
RRP: £136.16Excl. Tax: £109.11 Incl. Tax: £130.93 -
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3" inch Adjustable Length 65-206mm (023)
Product Code: 069108023SW
RRP: £53.28Excl. Tax: £29.65 Incl. Tax: £35.58 -
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7" inch Twin Wall Long Adjustable Pipe 530-880mm (022)
Product Code: 030118022DWJ--cpy
RRP: £167.82Excl. Tax: £105.67 Incl. Tax: £126.80 -
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4" inch Twin Wall insulated flue Pipe 270mm Length (025)
Product Code: 030110025DW
RRP: £106.49Excl. Tax: £32.99 Incl. Tax: £39.59 -
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7" inch Length 260mm (025)
Product Code: 0691018025FK
RRP: £32.97Excl. Tax: £18.35 Incl. Tax: £22.02 -
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12" inch Twin wall insluated flue Pipe 270mm (025)
Product Code: 030130025DWJ
RRP: £115.81Excl. Tax: £58.42 Incl. Tax: £70.10 -
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6" inch Length 925mm (020)
Product Code: 069115020FK
RRP: £89.85Excl. Tax: £46.99 Incl. Tax: £56.39 -
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8" inch Adjustable Length 65-206mm (023)
Product Code: 0691020023FK
RRP: £90.73Excl. Tax: £50.49 Incl. Tax: £60.59 -
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14" inch Twin wall Pipe 440mm (024)
Product Code: 030135024DWJ
RRP: £172.27Excl. Tax: £85.98 Incl. Tax: £103.18 -
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6" inch Twin Wall Short Adjustable Pipe 250-380mm (235)
Product Code: 030115235DWJ--cpy
RRP: £104.00Excl. Tax: £71.43 Incl. Tax: £85.72 -
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10" inch Twin Wall Medium Adjustable Pipe 350-530mm (023J)
Product Code: 030125023DWJ
RRP: £179.84Excl. Tax: £123.90 Incl. Tax: £148.68 -
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4" inch Twin Wall Medium Adjustable Pipe 350-530mm (023J)
Product Code: 030110023DWJ--cpy
RRP: £109.61Excl. Tax: £53.99 Incl. Tax: £64.79 -
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14" inch Length 425mm (024)
Product Code: 0691035024FK
RRP: £124.38Excl. Tax: £74.43 Incl. Tax: £89.32 -
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6" inch Twin Wall flue Locking Band (070)
Product Code: 030915070DW--cpy
RRP: £8.85Excl. Tax: £4.51 Incl. Tax: £5.41 -
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10" inch Twin wall Locking Band (070)
Product Code: 030925070DW
RRP: £12.47Excl. Tax: £7.93 Incl. Tax: £9.52 -
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4" inch Length 925mm (020)
Product Code: 069110020FK
RRP: £60.55Excl. Tax: £28.66 Incl. Tax: £34.39 -
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5" inch Twin Wall chimney flue Pipe 440mm (024)
Product Code: 030113024DWJ--cpy
RRP: £69.80Excl. Tax: £42.39 Incl. Tax: £50.87 -
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8" inch Twin Wall Flue Pipe - 1 metre length (020)
Product Code: 030120020DW2
RRP: £158.55Excl. Tax: £82.67 Incl. Tax: £99.20 -
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7" inch Twin Wall chimney flue Pipe 440mm (024)
Product Code: 030118024DWJ--cpy
RRP: £83.88Excl. Tax: £62.99 Incl. Tax: £75.59 -
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7" inch Length 925mm (020)
Product Code: 069118020FK
RRP: £107.42Excl. Tax: £42.99 Incl. Tax: £51.59 -
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12" inch Twin wall insulated flue Pipe 940mm (020)
Product Code: 030130020DWJ
RRP: £242.36Excl. Tax: £120.16 Incl. Tax: £144.19 -
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3" inch Twin Wall flue Medium Adjustable Pipe 350-530mm (023)
Product Code: 030108023DWJ--cpy
RRP: £97.93Excl. Tax: £63.91 Incl. Tax: £76.69 -
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10" inch Adjustable Length 65-206mm (023)
Product Code: 0691025023FK
RRP: £111.37Excl. Tax: £61.98 Incl. Tax: £74.38 -
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8" inch Length 260mm (025)
Product Code: 0691020025FK
RRP: £36.31Excl. Tax: £20.20 Incl. Tax: £24.24 -
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3" inch Length 260mm (025)
Product Code: 069108025FK
RRP: £21.32Excl. Tax: £11.86 Incl. Tax: £14.23 -
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6" inch Twin Wall flue Long Adjustable Pipe 530-880mm (022)
Product Code: 030115022DWJ--cpy
RRP: £151.96Excl. Tax: £104.38 Incl. Tax: £125.26 -
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10" inch Twin wall insulated flue Pipe 270mm (025)
Product Code: 030125025DWJ
RRP: £99.07Excl. Tax: £54.61 Incl. Tax: £65.53 -
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4" inch Twin Wall insulated flue Pipe 270mm Inspection Length (050)
Product Code: 030110050DW
RRP: £126.49Excl. Tax: £49.99 Incl. Tax: £59.99 -
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4" inch Twin Wall flue Locking Band (070)
Product Code: 030910070DW--cpy
RRP: £7.93Excl. Tax: £4.85 Incl. Tax: £5.82 -
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5" inch Adjustable Length 65-373mm (022)
Product Code: 0691013022FK
RRP: £75.41Excl. Tax: £55.99 Incl. Tax: £67.19 -
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5" inch Twin Wall Inspection Length 440mm (052)
Product Code: 030113052DW--cpy
RRP: £269.07Excl. Tax: £169.42 Incl. Tax: £203.30 -
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8" inch Twin Wall Short Adjustable Pipe 250-380mm (235)
Product Code: 030120235DW2
RRP: £133.08Excl. Tax: £90.09 Incl. Tax: £108.11 -
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3" inch Twin wall chimney flue Pipe 270mm (025)
Product Code: 030108025DWJ--cpy
RRP: £51.67Excl. Tax: £33.71 Incl. Tax: £40.45 -
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14" inch Twin wall Inspection Length 440mm (052)
Product Code: 030135052DW
RRP: £483.11Excl. Tax: £243.25 Incl. Tax: £291.90 -
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3" inch Twin Wall Locking Band (070)
Product Code: 030908070DW--cpy
RRP: £7.42Excl. Tax: £4.54 Incl. Tax: £5.45 -
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12" inch Adjustable Length 65-206mm (023)
Product Code: 0691030023FK
RRP: £132.19Excl. Tax: £73.56 Incl. Tax: £88.27 -
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10" inch Length 260mm (025)
Product Code: 0691025025FK
RRP: £44.62Excl. Tax: £24.83 Incl. Tax: £29.80 -
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8" inch Length 925mm (020)
Product Code: 069120020FK
RRP: £119.15Excl. Tax: £45.98 Incl. Tax: £55.18 -
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3" inch Length 925mm (020)
Product Code: 069108020FK
RRP: £52.75Excl. Tax: £25.36 Incl. Tax: £30.43 -
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10" inch Twin wall chimney flue Pipe 940mm (020)
Product Code: 030125020DWJ
RRP: £202.74Excl. Tax: £107.45 Incl. Tax: £128.94 -
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4" inch Twin Wall insulated Flue Pipe - 1 metre length (020)
Product Code: 030110020DWJ--cpy
RRP: £108.19Excl. Tax: £57.23 Incl. Tax: £68.68 -
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7" inch Twin Wall Inspection Length 440mm (052)
Product Code: 030118052DW--cpy
RRP: £286.49Excl. Tax: £172.19 Incl. Tax: £206.63 -
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12" inch Twin Wall Short Adjustable Pipe 250-380 (235)
Product Code: 030130235DWJ
RRP: £190.65Excl. Tax: £131.36 Incl. Tax: £157.63 -
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6" inch Adjustable Length 65-373mm (022)
Product Code: 0691015022FK
RRP: £85.58Excl. Tax: £59.99 Incl. Tax: £71.99 -
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5" inch Length 425mm (024)
Product Code: 0691013024FK
RRP: £43.00Excl. Tax: £29.95 Incl. Tax: £35.94 -
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6" inch Twin Wall insulated flue Pipe 440mm (024)
Product Code: 030115024DWJ--cpy
RRP: £78.11Excl. Tax: £42.39 Incl. Tax: £50.87 -
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8" inch Twin Wall Long Adjustable Pipe 530-880 (022)
Product Code: 030120022DW2
RRP: £193.56Excl. Tax: £123.11 Incl. Tax: £147.73 -
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3" inch Twin Wall chimney Flue Pipe - 1 metre length (020)
Product Code: 030108020DWJ--cpy
RRP: £99.32Excl. Tax: £61.40 Incl. Tax: £73.68 -
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14" inch Twin Wall Medium Adjustable Pipe 350-530mm (023J)
Product Code: 030135023DWJ
RRP: £288.08Excl. Tax: £145.05 Incl. Tax: £174.06 -
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14" inch Adjustable Length 65-206mm (023)
Product Code: 0691035023FK
RRP: £185.29Excl. Tax: £103.12 Incl. Tax: £123.74 -
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14" inch Twin wall Locking Band (070)
Product Code: 030935070DW
RRP: £23.56Excl. Tax: £12.99 Incl. Tax: £15.59 -
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12" inch Length 260mm (025)
Product Code: 0691030025FK
RRP: £52.94Excl. Tax: £29.46 Incl. Tax: £35.35 -
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10" inch Length 925mm (020)
Product Code: 069125020FK
RRP: £154.32Excl. Tax: £77.99 Incl. Tax: £93.59 -
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4" inch Adjustable Length 65-373mm (022)
Product Code: 0691010022FK
RRP: £66.10Excl. Tax: £36.78 Incl. Tax: £44.14 -
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5" inch Twin Wall Medium Adjustable Pipe 350-530mm (023J)
Product Code: 030113023DWJ--cpy
RRP: £104.48Excl. Tax: £89.71 Incl. Tax: £107.65 -
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7" inch Twin Wall Medium Adjustable Pipe 350-530mm (023J)
Product Code: 030118023DW--cpy
RRP: £129.77Excl. Tax: £96.57 Incl. Tax: £115.88 -
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7" inch Adjustable Length 65-373mm (022)
Product Code: 0691018022FK
RRP: £100.71Excl. Tax: £56.04 Incl. Tax: £67.25 -
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12" inch Twin Wall Long Adjustable Pipe 530-880 (022)
Product Code: 030130022DWJ
RRP: £278.93Excl. Tax: £177.40 Incl. Tax: £212.88 -
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6" inch Length 425mm (024)
Product Code: 0691015024FK
RRP: £49.41Excl. Tax: £34.99 Incl. Tax: £41.99 -
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7" inch Twin Wall Locking Band (070)
Product Code: 030918070DW--cpy
RRP: £9.35Excl. Tax: £5.60 Incl. Tax: £6.72 -
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8" inch Twin Wall Pipe 440mm (024)
Product Code: 030120024DW2
RRP: £97.53Excl. Tax: £57.38 Incl. Tax: £68.86 -
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14" inch Twin wall Pipe 270mm (025)
Product Code: 030135025DWJ
RRP: £150.91Excl. Tax: £75.98 Incl. Tax: £91.18 -
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6" inch Twin Wall Inspection Length 440mm (052)
Product Code: 030115052DW--cpy
RRP: £275.40Excl. Tax: £157.64 Incl. Tax: £189.17 -
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10" inch Twin Wall Short Adjustable Pipe 250-380 (235)
Product Code: 030125235DWJ
RRP: £161.87Excl. Tax: £111.52 Incl. Tax: £133.82 -
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4" inch Twin Wall Short Adjustable Pipe 250-380mm (235)
Product Code: 030110235DWJ--cpy
RRP: £99.80Excl. Tax: £50.87 Incl. Tax: £61.04
Twin Wall Flue & Single Wall Flue Commercial
About our Insulated twin wall Chimney Flue Pipe
- Twin wall flue can be used where there is no existing chimney. It can be uses internally and externally and pass through, walls, floors and the roof depending upon the flue route required.
- Our Dinak flue system (EN 1856-1 T450 N1 W VmL50040 G60) and KC Convesa flue pipe range (EN1856-1 T600 N1 W VM L50040 G60) are both HETAS approved and fast and easy to install and due to their quality manufacture, plus they come with a 10yr warranty.
- Suitable for all types of multi fuel applications using wood, solid (coal), oil, gas, diesel, biofuel and pellet appliances.
- Both twin wall flue systems are suitable for condensing and dry applications (you must order seals/joints with each component of flue pipe for condensing applications).
- Our stainless steel, insulated flue systems are available in 3" 80mm, 4" 100mm, 5" 130mm, 6" 150mm, 7" 180mm, 8" 200mm, 10" 250mm, 12" 300mm and 14" 350mm. 5" 130mm and 6" 150mm 7" 180mm and 8" 200 mm are also available in black. Black/stainless twin wall flue are fully interchangeable.
- Widest range of diameters available on the market along with all the variations of components required for both domestic and commercial installations.
- Perfect choice for biomass boiler flue installations.
How to Install a Twin Wall Flue System
Our Chimney flue truly is a 'Fitters Choice' as it comes in all the possible diameters required, with all the possible components for commercial and domestic applications and with the ability to increase flue size going up as necessary. It is a simple push fit joint system that is both fast and easy to install and comes fully welded to ensure a superior finished twin wall system (60mm to combustibles). Please ensure that the finished system is as vertically straight as possible. All domestic flue installations should be carried out by a HETAS approved installer. For condensing applications please order and fit and seals with each component.
The chimney should remain as straight as possible and be high enough to ensure sufficient draught to clear the products of combustion. The height necessary for this will depend upon the type of the appliance, the height of the building, and the number of offsets within the system. However, a minimum flue height of 4.5m should be achieved as recommended in the Building Regulations. All chimneys must comply with the Clean Air Act. The size of the chimney system should be as recommended by the appliance manufacturer and in most cases should not be smaller than the appliance outlet.
Single Wall Stainless Steel Condensing Flue pipe Technical information
This is a modular single skin chimney system manufactured to BS EN1856-1, constructed from AISI 316L fully welded liner and is CE approved. It is suitable for gas, oil and solid fuels and for dry, condensing (wet) or non-condensing applications. We would recommend using our twin wall flue systems for Biomass flue installations.
Working temperature:
250ºC EN1856-1: Chimneys
600ºC EN 1856-2: Liners
200 Pa (No seal required)
Tested for soot fire resistance for chimney lining.