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MI-FLEX 125MM (5 INCH) Flue Liner - Install Kits & Accessories

Explore our premium range of MI-FLEX 125MM (5 INCH) flue liners, install kits, and accessories designed for optimal performance and durability. Whether you need a coil or cut length liner, we offer top-of-the-line 316L Mi-FLEX products to ensure your chimney system functions smoothly and safely.

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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.

£65.49

20-125-PHCM1

Pot Hanging Cowl 1mm (Natural) - Ø 125

Pot Hanging Cowl 1mm (Natural) - Ø 125

OUT OF STOCK

£64.49

20-125-PHCMB

PH Cowl - Ø 125

PH Cowl - Ø 125

OUT OF STOCK

£70.49

20-125-PHCMC

PH Cowl - Buff / Straps / Mesh x 125mm - Ø 125

PH Cowl - Buff / Straps / Mesh x 125mm - Ø 125

OUT OF STOCK

£70.99

20-125-PHCMT1

Pot Hanging Cowl 1mm (Painted) - Ø 125

Pot Hanging Cowl 1mm (Painted) - Ø 125

OUT OF STOCK

£67.49

20-125-PHCMT400

MI-FLEX Pot Hanging Cowl (Terracotta) Ø 400 Lid - Ø 125

MI-FLEX Pot Hanging Cowl (Terracotta) Ø 400 Lid - Ø 125

OUT OF STOCK

£30.49

20-125-PSRC

Top Insert Sleeve with Rain Cap - Ø 125

Top Insert Sleeve with Rain Cap - Ø 125

£25.49

20-125-RC

Rain Cap - Ø 125

Rain Cap - Ø 125

£10.49

20-125-SUPCL

MI-FLEX Pot Hanger Support Clamp - Ø 125

MI-FLEX Pot Hanger Support Clamp - Ø 125

OUT OF STOCK

£24.99

25-125-PHS

Screw-FIX Pot Hanger - Ø 125

Screw-FIX Pot Hanger - Ø 125

£25.49

25-125-RC

Screw-FIX Rain Cap - Ø 125

Screw-FIX Rain Cap - Ø 125

£9.99

20-125-C

Top Clamp - Ø 125

Top Clamp - Ø 125

£10.99

20-125-P

Top Plate - Ø 125

Top Plate - Ø 125

£22.49

20-125-PHS

Pot Hanger - Ø 125

Pot Hanger - Ø 125

£11.49

20-125-PS

Top Insert Sleeve - Ø 125

Top Insert Sleeve - Ø 125

Your 125MM (5 INCH) Questions Answered

What is the difference between a 125mm (5 inch) flue liner and other sizes? -

The 125mm (5 inch) flue liner is specifically designed for smaller fireplace openings and is suitable for wood-burning stoves and small appliances.

Do I need special tools to install a 125mm (5 inch) flue liner? +

Are MI-FLEX 125MM (5 INCH) flue liners compatible with all chimney systems? +

How do I maintain and clean a 125mm (5 inch) flue liner? +

Can I use a 125mm (5 inch) flue liner with a multi-fuel stove? +

Are MI-FLEX 125MM (5 INCH) flue liners compliant with building regulations? +

Do you provide installation services for MI-FLEX 125MM (5 INCH) flue liners? +

What are the benefits of using a MI-FLEX 125MM (5 INCH) flue liner over traditional options? +

When it comes to ensuring your fireplace operates efficiently, choosing the right flue liner is essential. Our 125mm (5 inch) MI-FLEX range provides superior quality flue liners made from durable 316L stainless steel. These liners are corrosion-resistant, ensuring a long lifespan for your chimney system. Additionally, our install kits, fixings, terminals, insulation, and accessories are expertly crafted to complement your flue liner installation, making maintenance hassle-free.
Why Buy 125MM (5 INCH) Products
The MI-FLEX 125MM (5 INCH) flue liners are ideal for both residential and commercial fireplace applications. These liners are suitable for various fuel types, including wood, gas, oil, and solid fuels. Whether you are constructing a new chimney or renovating an existing one, our 316L Mi-FLEX products provide the perfect solution for efficient and safe venting of combustion by-products.

Trusted By Trade Professionals

Our 125MM (5 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 125MM (5 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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