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316L Mi-FLEX Flue Liner | Durable & Versatile Flue System - National Flues

Looking for a durable and versatile flue system? Explore our 316L Mi-FLEX range, designed to meet all your fireplace installation requirements. Crafted from high-quality stainless steel, our flue liners ensure optimal safety and performance. Whether you need a 3-inch or a 12-inch liner, we have you covered. With a comprehensive selection of fixings, terminals, insulation, and accessories, you can trust in our products for a seamless installation process.

 

MI-FlexMI-Flex
Chimney FlueChimney Flue
Connecting PipesConnecting Pipes
Fans Flashings CowlsFans Flashings Cowls
Installation PartsInstallation Parts
After Care PartsAfter Care Parts
StovesStoves
FireplacesFireplaces
80MM (3 INCH)
80MM (3 INCH)
100MM (4 INCH)
100MM (4 INCH)
125MM (5 INCH)
125MM (5 INCH)
150MM (6 INCH)
150MM (6 INCH)
175MM (7 INCH)
175MM (7 INCH)
200MM (8 INCH)
200MM (8 INCH)
250MM (10 INCH)
250MM (10 INCH)
300MM (12 INCH)
300MM (12 INCH)
Increasing MI-FLEX Adaptor 1mm  - Ø 125-Ø 150
SKU: 20-125-MR1

Increasing MI-FLEX Adaptor 1mm - Ø 125-Ø 150

£42.49 incl VAT

Increasing MI-FLEX Adaptor - Ø 125-Ø 175
SKU: 20-125-MRD

Increasing MI-FLEX Adaptor - Ø 125-Ø 175

£66.49 incl VAT

Long Tail Increasing MI-FLEX Adaptor - Ø 125-Ø 150
SKU: 20-125-MRLT

Long Tail Increasing MI-FLEX Adaptor - Ø 125-Ø 150

£37.99 incl VAT

Nose Cone - Ø 125
SKU: 20-125-NC

Nose Cone - Ø 125

£5.49 incl VAT

Top Plate - Ø 125
SKU: 20-125-P

Top Plate - Ø 125

£10.99 incl VAT

Pack 501 - (125mm, P/C/PS/N/CNP/MAE)
SKU: 20-125-P501

Pack 501 - (125mm, P/C/PS/N/CNP/MAE)

£41.99 incl VAT

Pack 502 - (125mm, P/C/N/CNP/MAE/RC)
SKU: 20-125-P502

Pack 502 - (125mm, P/C/N/CNP/MAE/RC)

£60.99 incl VAT

Pack 503 - (125mm, PHCM/N/CNP/MAE)
SKU: 20-125-P503

Pack 503 - (125mm, PHCM/N/CNP/MAE)

£72.49 incl VAT

Pack 504 - (125mm, P/C/PS/N/CNP/20-100-MR)
SKU: 20-125-P504

Pack 504 - (125mm, P/C/PS/N/CNP/20-100-MR)

£47.49 incl VAT

Pack 505 - (125mm, P/C/N/CNP/20-100-MR/RC)
SKU: 20-125-P505

Pack 505 - (125mm, P/C/N/CNP/20-100-MR/RC)

£64.49 incl VAT

Pack 506 - (125mm, PHCM/N/CNP/20-100-MR)
SKU: 20-125-P506

Pack 506 - (125mm, PHCM/N/CNP/20-100-MR)

£75.99 incl VAT

Pack 507 - (125mm, PHCMT/N/CNP/MAE)
SKU: 20-125-P507

Pack 507 - (125mm, PHCMT/N/CNP/MAE)

£77.99 incl VAT

Pack 508 - (125mm, PHCMT/N/CNP/20-100-MR)
SKU: 20-125-P508

Pack 508 - (125mm, PHCMT/N/CNP/20-100-MR)

£81.49 incl VAT

Pot Hanger with AD Cowl - Ø 125
SKU: 20-125-PHAD

Pot Hanger with AD Cowl - Ø 125

£97.99 incl VAT

Pot Hanger with AD Cowl (Terracotta) - Ø 125
SKU: 20-125-PHADT

Pot Hanger with AD Cowl (Terracotta) - Ø 125

£97.99 incl VAT

MI-FLEX Pot Hanging Cowl (Natural) - Ø 125
SKU: 20-125-PHCM

MI-FLEX Pot Hanging Cowl (Natural) - Ø 125

£64.99 incl VAT

MI-FLEX Support Pot Hanging Cowl (Natural) - Ø 125
SKU: 20-125-PHCM-S

MI-FLEX Support Pot Hanging Cowl (Natural) - Ø 125

£70.99 incl VAT

MI-FLEX Pot Hanging Cowl (Terracotta) - Ø 125
SKU: 20-125-PHCMT

MI-FLEX Pot Hanging Cowl (Terracotta) - Ø 125

£68.49 incl VAT

MI-FLEX Support Pot Hanging Cowl (Terracotta) - Ø 125
SKU: 20-125-PHCMT-S

MI-FLEX Support Pot Hanging Cowl (Terracotta) - Ø 125

£73.99 incl VAT

Pot Hanger - Ø 125
SKU: 20-125-PHS

Pot Hanger - Ø 125

£22.49 incl VAT

Your Questions Answered

What is the difference between 316L Mi-FLEX and other flue liners? -

316L Mi-FLEX stands out due to its high-grade stainless steel construction, which enhances durability and corrosion resistance. Its flexibility and smooth inner surface make it suitable for various fireplace applications.

Can I use 316L Mi-FLEX for both wood burners and gas appliances? +

How do I know what size of 316L Mi-FLEX liner I need? +

Do I need professional help to install 316L Mi-FLEX liners? +

Is insulation necessary when using 316L Mi-FLEX liners? +

Can I use 316L Mi-FLEX liners in listed buildings? +

How long can I expect a 316L Mi-FLEX liner to last? +

At National Flues, we take pride in offering top-tier flue solutions for domestic and commercial applications. Our 316L Mi-FLEX flue liners are renowned for their durability, flexibility, and corrosion resistance, making them ideal for a wide range of projects. Whether you're a professional installer or a DIY enthusiast, our cut lengths and coils provide flexibility in fitting various flue sizes. Trust in the quality of our products to ensure a safe and efficient fireplace setup.
Why Buy These Products
The 316L Mi-FLEX flue liners are designed to cater to diverse applications, including wood burners, multi-fuel stoves, gas appliances, and more. With their high-temperature resistance and smooth inner surface, these liners promote optimal airflow and protect your chimney structure from heat and corrosion. Whether you're renovating an existing chimney or installing a new flue system, our Mi-FLEX range offers reliability and performance. Enjoy peace of mind knowing that your fireplace system is well-equipped to handle intense heat and emissions.

Trusted By Trade Professionals

Our 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. Our team is here to assist you every step of the way, ensuring your needs are met with expertise and care.