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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14" inch Length 260mm (025)
Product Code: 0691035025FK
RRP: £74.27Excl. Tax: £41.33 Incl. Tax: £49.60 -
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12" inch Length 925mm (020)
Product Code: 069130020FK
RRP: £191.41Excl. Tax: £73.85 Incl. Tax: £88.62 -
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4" inch Length 425mm (024)
Product Code: 0691010024FK
RRP: £33.28Excl. Tax: £18.19 Incl. Tax: £21.83 -
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5" inch Twin Wall chimney flue Pipe 270mm (025)
Product Code: 030113025DW--cpy
RRP: £55.38Excl. Tax: £40.27 Incl. Tax: £48.32 -
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3" inch Adjustable Length 65-373mm (022)
Product Code: 069108022SW
RRP: £65.10Excl. Tax: £36.23 Incl. Tax: £43.48 -
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7" inch Twin Wall chimney flue Pipe 270mm (025)
Product Code: 030118025DWJ--cpy
RRP: £71.24Excl. Tax: £48.93 Incl. Tax: £58.72 -
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7" inch Length 425mm (024)
Product Code: 0691018024FK
RRP: £59.10Excl. Tax: £27.56 Incl. Tax: £33.07 -
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12" inch Twin wall insulated flue Pipe 440mm (024)
Product Code: 030130024DWJ
RRP: £147.87Excl. Tax: £77.16 Incl. Tax: £92.59 -
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3" inch Twin Wall flue Short Adjustable Pipe 250-380 (235)
Product Code: 030108235DWJ--cpy
RRP: £89.06Excl. Tax: £58.12 Incl. Tax: £69.74 -
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8" inch Adjustable Length 65-373mm (022)
Product Code: 0691020022FK
RRP: £110.91Excl. Tax: £61.72 Incl. Tax: £74.06 -
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14" inch Twin wall Pipe 940mm (020)
Product Code: 030135020DWJ
RRP: £436.86Excl. Tax: £169.59 Incl. Tax: £203.51 -
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6" inch Twin Wall flue Medium Adjustable Pipe 350-530mm (023J)
Product Code: 030115023DWJ--cpy
RRP: £115.54Excl. Tax: £79.36 Incl. Tax: £95.23 -
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10" inch Twin Wall Long Adjustable Pipe 530-880 (022)
Product Code: 030125022DWJ
RRP: £242.36Excl. Tax: £154.15 Incl. Tax: £184.98 -
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4" inch Twin Wall flue Long Adjustable Pipe 530-880mm (022)
Product Code: 030110022DWJ--cpy
RRP: £139.38Excl. Tax: £90.95 Incl. Tax: £109.14 -
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14" inch Length 925mm (020)
Product Code: 069135020FK
RRP: £226.13Excl. Tax: £119.99 Incl. Tax: £143.99 -
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5" inch Adjustable Length 65-206mm (023)
Product Code: 0691013023SW
RRP: £61.78Excl. Tax: £42.99 Incl. Tax: £51.59 -
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5" inch Twin Wall chimney flue Pipe 1 metre length (940mm installed) (020)
Product Code: 030113020DWJ--cpy
RRP: £113.04Excl. Tax: £48.75 Incl. Tax: £58.50 -
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6" inch Twin Wall insulated flue Pipe 200mm (255)
Product Code: 030115255DW
RRP: £59.96Excl. Tax: £36.86 Incl. Tax: £44.23 -
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5" inch Twin Wall Starter Length 940mm (147)
Product Code: 030113147DE--cpy
RRP: £150.74Excl. Tax: £77.65 Incl. Tax: £93.18 -
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8" inch Twin Wall Inspection Length 440mm (052)
Product Code: 030120052DW2
RRP: £322.90Excl. Tax: £221.79 Incl. Tax: £266.15 -
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3" inch Twin Wall flue Long Adjustable Pipe 530-880 (022)
Product Code: 030108022DWJ--cpy
RRP: £124.85Excl. Tax: £81.47 Incl. Tax: £97.76 -
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8" inch Twin Wall Locking Band (070)
Product Code: 030920070DW2
RRP: £10.41Excl. Tax: £4.75 Incl. Tax: £5.70 -
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10" inch Adjustable Length 65-373mm (022)
Product Code: 0691025022FK
RRP: £136.20Excl. Tax: £75.79 Incl. Tax: £90.95 -
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8" inch Length 425mm (024)
Product Code: 0691020024FK
RRP: £65.54Excl. Tax: £30.87 Incl. Tax: £37.04 -
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3" inch Length 425mm (024)
Product Code: 069108024FK
RRP: £29.00Excl. Tax: £15.43 Incl. Tax: £18.52 -
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7" inch Twin Wall chimney Flue Pipe - 1 metre length (020)
Product Code: 030118020DW--cpy
RRP: £134.54Excl. Tax: £89.99 Incl. Tax: £107.99 -
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10" inch Twin wall insulated flue pipe 440mm (024)
Product Code: 030125024DWJ
RRP: £117.40Excl. Tax: £69.06 Incl. Tax: £82.87 -
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4" inch Twin Wall insulated flue Pipe 440mm (024)
Product Code: 030110024DWJ--cpy
RRP: £68.19Excl. Tax: £47.47 Incl. Tax: £56.96 -
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12" inch Twin wall Inspection Length 440mm (052)
Product Code: 030130052DW
RRP: £374.93Excl. Tax: £238.46 Incl. Tax: £286.15 -
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6" inch Adjustable Length 65-206mm (023)
Product Code: 0691015023FK
RRP: £70.09Excl. Tax: £51.99 Incl. Tax: £62.39 -
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5" inch Length 260mm (025)
Product Code: 0691013025FK
RRP: £24.80Excl. Tax: £21.99 Incl. Tax: £26.39 -
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6" inch Twin Wall insulated flue Pipe 270mm (025)
Product Code: 030115025DWJ--cpy
RRP: £61.77Excl. Tax: £40.27 Incl. Tax: £48.32 -
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5" inch Twin Wall Short Adjustable Pipe 250-380mm (235)
Product Code: 030113235DWJ--cpy
RRP: £94.04Excl. Tax: £75.36 Incl. Tax: £90.43 -
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8" inch Twin Wall Medium Adjustable Pipe 350-530mm (023)
Product Code: 030120023DW2
RRP: £147.87Excl. Tax: £101.88 Incl. Tax: £122.26 -
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3" inch Twin Wall chimney flue Pipe 440mm (024)
Product Code: 030108024DWJ--cpy
RRP: £61.07Excl. Tax: £39.85 Incl. Tax: £47.82 -
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14" inch Twin Wall Short Adjustable Pipe 250-380 (235)
Product Code: 030135235DWJ
RRP: £259.27Excl. Tax: £124.57 Incl. Tax: £149.48 -
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5" inch Twin Wall flue Locking Band (070)
Product Code: 030913070DW.
RRP: £8.24Excl. Tax: £4.20 Incl. Tax: £5.04 -
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12" inch Adjustable Length 65-373mm (022)
Product Code: 0691030022FK
RRP: £177.63Excl. Tax: £98.86 Incl. Tax: £118.63 -
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10" inch Length 425mm (024)
Product Code: 0691025024FK
RRP: £84.88Excl. Tax: £46.99 Incl. Tax: £56.39 -
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4" inch Adjustable Length 65-206mm (023)
Product Code: 0691010023SW
RRP: £55.14Excl. Tax: £30.69 Incl. Tax: £36.83 -
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7" inch Twin Wall Short Adjustable Pipe 250-380mm (235)
Product Code: 030118235DWJ--cpy
RRP: £116.80Excl. Tax: £80.23 Incl. Tax: £96.28 -
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7" inch Adjustable Length 65-206mm (023)
Product Code: 069118023FK
RRP: £82.41Excl. Tax: £45.87 Incl. Tax: £55.04 -
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12" inch Twin Wall Medium Adjustable Pipe 350-530mm (023J)
Product Code: 030130023DWJ
RRP: £211.84Excl. Tax: £145.95 Incl. Tax: £175.14 -
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6" inch Length 260mm (025)
Product Code: 0691015025FK
RRP: £28.12Excl. Tax: £15.65 Incl. Tax: £18.78 -
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12" inch Twin wall Locking Band (070)
Product Code: 030930070DW
RRP: £13.89Excl. Tax: £7.71 Incl. Tax: £9.25 -
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5" inch Length 925mm (020)
Product Code: 069113020FK
RRP: £78.14Excl. Tax: £39.99 Incl. Tax: £47.99 -
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6" inch Twin Wall chimney Flue Pipe 1 metre length (020)
Product Code: 030115020DW--cpy
RRP: £120.27Excl. Tax: £57.99 Incl. Tax: £69.59 -
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4" inch Soot Collector with Drain (061)
Product Code: 0691010061FK
RRP: £24.15Excl. Tax: £13.44 Incl. Tax: £16.13 -
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4" inch Twin Wall insulated flue 90 Elbow (433)
Product Code: 030110433DWJ--cpy
RRP: £152.47Excl. Tax: £83.94 Incl. Tax: £100.73 -
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7" inch Twin Wall flue 135 Tee (030)
Product Code: 030118030DW--cpy
RRP: £258.00Excl. Tax: £137.79 Incl. Tax: £165.35 -
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12" inch Twin Wall flue 15 Elbow (044)
Product Code: 030130044DWJ
RRP: £166.12Excl. Tax: £90.24 Incl. Tax: £108.29 -
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5" inch Twin Wall Tee Cap with Drain (061)
Product Code: 030113061DW
RRP: £59.25Excl. Tax: £44.09 Incl. Tax: £52.91 -
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3" inch Twin Wall Tee Cap (060)
Product Code: 030108060DWJ--cpy
RRP: £42.20Excl. Tax: £37.68 Incl. Tax: £45.22 -
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14" inch Twin wall Tee Cap with side Drain (613)
Product Code: 0301350613DWJ
RRP: £152.43Excl. Tax: £76.75 Incl. Tax: £92.10 -
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6" inch Reducing Tee 90° (312)
Product Code: 150312FK
RRP: £185.12Excl. Tax: £86.54 Incl. Tax: £103.85 -
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14" inch Soot Collector with Drain (061)
Product Code: 0691035061FK
RRP: £90.73Excl. Tax: £50.49 Incl. Tax: £60.59 -
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12" inch Inspection Tee (wet apps) (523)
Product Code: 300523FK
RRP: £255.06Excl. Tax: £141.94 Incl. Tax: £170.33 -
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5" inch Twin Wall flue 45 Elbow (040)
Product Code: 030113040DWJ--cpy
RRP: £72.79Excl. Tax: £54.17 Incl. Tax: £65.00 -
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8" inch Twin Wall flue 45 Elbow (040)
Product Code: 030120040DWJ2
RRP: £102.12Excl. Tax: £64.95 Incl. Tax: £77.94 -
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3" inch Twin Wall flue 90 Elbow (433)
Product Code: 030108433DWJ--cpy
RRP: £142.16Excl. Tax: £102.53 Incl. Tax: £123.04 -
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8" inch Soot Collector with side drain (613)
Product Code: 06910200613FK
RRP: £44.46Excl. Tax: £24.74 Incl. Tax: £29.69 -
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14" inch Twin Wall 30 Elbow (042)
Product Code: 030135042DWJ
RRP: £228.62Excl. Tax: £110.23 Incl. Tax: £132.28 -
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6" inch Twin Wall 90 Tee (031)
Product Code: 030115031DW--cpy
RRP: £140.86Excl. Tax: £76.31 Incl. Tax: £91.57 -
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10" inch Twin Wall 90 Tee (031)
Product Code: 030125031DW
RRP: £257.66Excl. Tax: £131.10 Incl. Tax: £157.32 -
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7" inch Twin wall Tee Cap with side Drain (613)
Product Code: 0301180613DWJ--cpy
RRP: £76.11Excl. Tax: £52.28 Incl. Tax: £62.74 -
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7" inch Soot Collector (060)
Product Code: 0691018060FK
RRP: £35.80Excl. Tax: £19.92 Incl. Tax: £23.90 -
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12" inch Twin wall Tee Cap with Drain (061)
Product Code: 030130061DWJ
RRP: £100.61Excl. Tax: £50.66 Incl. Tax: £60.79 -
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14" inch Elbow 45° (040)
Product Code: 0691035040FK
RRP: £129.53Excl. Tax: £72.08 Incl. Tax: £86.50 -
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6" inch Inspection Tee (dry apps.) (521)
Product Code: 150521FK
RRP: £370.45Excl. Tax: £171.97 Incl. Tax: £206.36 -
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4" inch Reducing Tee 90° (312)
Product Code: 069101031AFK
RRP: £113.96Excl. Tax: £61.73 Incl. Tax: £74.08 -
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7" inch Twin Wall flue 30 Elbow (042)
Product Code: 030118042DWJ--cpy
RRP: £107.67Excl. Tax: £70.87 Incl. Tax: £85.04 -
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7" inch Reducing Tee 90° (312)
Product Code: 180312FK
RRP: £213.71Excl. Tax: £98.11 Incl. Tax: £117.73 -
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12" inch Twin wall flue 45 Elbow (040)
Product Code: 030130040DWJ
RRP: £146.33Excl. Tax: £73.85 Incl. Tax: £88.62 -
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8" inch Twin Wall 93 Tee (31A)
Product Code: 03012031ADW2
RRP: £211.84Excl. Tax: £101.05 Incl. Tax: £121.26 -
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14" inch Twin Wall Tee Cap (060)
Product Code: 030135060DWJ
RRP: £121.91Excl. Tax: £58.43 Incl. Tax: £70.12 -
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14" inch Inspection Tee (wet apps) (523)
Product Code: 350523FK
RRP: £322.32Excl. Tax: £179.37 Incl. Tax: £215.24 -
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10" inch Elbow 87° (043)
Product Code: 0691025043FK
RRP: £141.86Excl. Tax: £78.94 Incl. Tax: £94.73 -
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3" inch Twin Wall flue 135 Tee (030)
Product Code: 030108030DWJ
RRP: £240.25Excl. Tax: £125.92 Incl. Tax: £151.10 -
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4" inch Inspection Tee (wet apps) (523)
Product Code: 100523FK
RRP: £103.23Excl. Tax: £57.45 Incl. Tax: £68.94 -
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10" inch Tee 135° (030)
Product Code: 0691025030SW
RRP: £369.05Excl. Tax: £149.99 Incl. Tax: £179.99 -
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5" inch Twin Wall flue 90 Elbow (433)
Product Code: 030113433DWJ--cpy
RRP: £152.88Excl. Tax: £85.76 Incl. Tax: £102.91 -
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8" inch Twin Wall flue 90 Elbow (433)
Product Code: 030120433DWJ2
RRP: £214.45Excl. Tax: £97.74 Incl. Tax: £117.29 -
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8" inch Soot Collector (060)
Product Code: 0691020060FK
RRP: £39.47Excl. Tax: £21.96 Incl. Tax: £26.35
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.