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MI-Flex 316L Mi-FLEX 150MM (6 INCH) Flue Liner - Buy Now & Stay Cozy

Looking to enhance your fireplace performance? The MI-Flex 316L Mi-FLEX 150MM (6 INCH) flue liner is the perfect solution. This durable, easy-to-install liner provides excellent ventilation, ensuring your fireplace operates at its best. With top-grade materials and precise engineering, this flue liner is designed to last and keep your home safe. Explore our range of accessories and install kits to complete your fireplace setup effortlessly.
Looking to enhance your fireplace performance? The MI-Flex 316L Mi-FLEX 150MM (6 INCH) flue liner is the perfect solution. This durable, easy-to-install liner provides excellent ventilation, ensuring your fireplace operates at its best. With top-grade materials and precise engineering, this flue liner is designed to last and keep your home safe. Explore our range of accessories and install kits to complete your fireplace setup effortlessly.


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The best selling flue liner in the UK. Suitable for gas, oil, and approved solid fuels. Call our advisers on 01670 206 999 if you need any help choosing.

£1.93 £878.99
Showing 20 of 86 items
Pack 603 - (150mm, PHCM/N/CNP/MAE)

Pack 603 - (150mm, PHCM/N/CNP/MAE)

20-150-P603
£77.99 (including VAT)
In stock
Pack 604 - (150mm, P/C/PS/N/CNP/20-125-MR)

Pack 604 - (150mm, P/C/PS/N/CNP/20-125-MR)

20-150-P604
£52.99 (including VAT)
In stock
Pack 605 - (150mm, P/C/N/CNP/20-125-MR/RC)

Pack 605 - (150mm, P/C/N/CNP/20-125-MR/RC)

20-150-P605
£68.99 (including VAT)
In stock
Pack 606 - (150mm, PHCM/N/CNP/20-125-MR)

Pack 606 - (150mm, PHCM/N/CNP/20-125-MR)

20-150-P606
£83.99 (including VAT)
In stock
Pack 607 - (150mm, PHCMT/N/CNP/MAE)

Pack 607 - (150mm, PHCMT/N/CNP/MAE)

20-150-P607
£85.99 (including VAT)
In stock
Pack 608 - (150mm, PHCMT/N/CNP/20-125-MR)

Pack 608 - (150mm, PHCMT/N/CNP/20-125-MR)

20-150-P608
£93.99 (including VAT)
In stock
Pot Hanger with AD Cowl - Ø 150

Pot Hanger with AD Cowl - Ø 150

20-150-PHAD
£101.99 (including VAT)
In stock
Pot Hanger with AD Cowl (Terracotta) - Ø 150

Pot Hanger with AD Cowl (Terracotta) - Ø 150

20-150-PHADT
£101.99 (including VAT)
In stock
MI-FLEX Pot Hanging Cowl (Natural) - Ø 150

MI-FLEX Pot Hanging Cowl (Natural) - Ø 150

20-150-PHCM
£59.99 (including VAT)
In stock
MI-FLEX Support Pot Hanging Cowl (Natural) - Ø 150

MI-FLEX Support Pot Hanging Cowl (Natural) - Ø 150

20-150-PHCM-S
£73.99 (including VAT)
In stock
MI-FLEX Pot Hanging Cowl (Terracotta) - Ø 150

MI-FLEX Pot Hanging Cowl (Terracotta) - Ø 150

20-150-PHCMT
£59.99 (including VAT)
In stock
MI-FLEX Support Pot Hanging Cowl (Terracotta) - Ø 150

MI-FLEX Support Pot Hanging Cowl (Terracotta) - Ø 150

20-150-PHCMT-S
£76.99 (including VAT)
In stock
Pot Hanger with Straps - Ø 150

Pot Hanger with Straps - Ø 150

20-150-PHS
£26.99 (including VAT)
In stock
Top Insert Sleeve - Ø 150

Top Insert Sleeve - Ø 150

20-150-PS
£12.99 (including VAT)
In stock
Rain Cap - Ø 150

Rain Cap - Ø 150

20-150-RC
£30.99 (including VAT)
In stock
Register Plate Adaptor - Ø 150

Register Plate Adaptor - Ø 150

20-150-RPA
£55.99 (including VAT)
In stock
Top Hat Adaptor - Ø 150

Top Hat Adaptor - Ø 150

20-150-THA
£62.99 (including VAT)
In stock
Chimney Notice Plate

Chimney Notice Plate

20-CNP
£1.93 (including VAT)
In stock
Chimney Notice Plate - 50 Pack

Chimney Notice Plate - 50 Pack

20-CNP48
£90.99 (including VAT)
In stock
MI-FLEX FastFix-Screw Adaptor to SW - Ø150

MI-FLEX FastFix-Screw Adaptor to SW - Ø150

21-150-MAE
£21.99 (including VAT)
In stock
Your 150MM (6 INCH) Questions Answered

Is the MI-Flex 316L Mi-FLEX 150MM (6 INCH) flue liner suitable for all types of fuel? -

Yes, this flue liner is compatible with a wide range of fuels, including wood, coal, gas, and oil. It is designed to handle high temperatures and various combustion byproducts efficiently.

How long does the MI-Flex 150MM (6 INCH) flue liner last? +

Can I install the flue liner myself? +

Do I need any special tools to install the MI-Flex 150MM (6 INCH) flue liner? +

Is insulation necessary when installing the flue liner? +

How do I know what length of flue liner I need for my fireplace? +

Are there any regulations I need to consider when installing a flue liner? +

Can the MI-Flex 150MM (6 INCH) flue liner be used in a multi-fuel stove? +

The MI-Flex 316L Mi-FLEX 150MM (6 INCH) flue liner is a top choice for homeowners seeking quality and performance. Made from premium 316L stainless steel, this flue liner offers durability and corrosion resistance, ensuring years of reliable service. Easy to cut and install, it's suitable for various fireplace setups, providing a seamless connection for optimal ventilation. With the MI-Flex 150MM (6 INCH) flue liner, you can enjoy a safer and more efficient fireplace experience.
Why Buy 150MM (6 INCH) Products
The MI-Flex 316L Mi-FLEX 150MM (6 INCH) flue liner is ideal for both new fireplace installations and upgrades. By using this flue liner, you can improve the draft efficiency of your chimney, reduce the risk of creosote buildup, and enhance overall safety. Whether you have a traditional open fireplace or a wood-burning stove, the MI-Flex 150MM (6 INCH) flue liner can help you achieve optimal performance and peace of mind.

Trusted By Trade Professionals

Our 150MM (6 INCH) products and services are trusted by hundreds of professionals nationwide. We're committed to providing quality and reliability that meets the high standards of our customers.

Dedicated Support

Experience our unparalleled customer service and support when you buy 150MM (6 INCH) from National Flues. Our team is here to assist you every step of the way, ensuring your needs are met with expertise and care.

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