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Top Quality 175MM (7 INCH) Flue Liners & Installation Kits - Buy Online

Upgrade your fireplace with our premium 175mm (7 inch) flue liners and installation kits. Our MI-Flex and 904L Mi-FLEX products are known for their durability and efficiency. Whether you need a coil or a cut length, we have you covered. Our range includes everything from bottom fixings to insulation and reg plates, ensuring a hassle-free installation process. Trust in our products for a safe and efficient fireplace experience.
Upgrade your fireplace with our premium 175mm (7 inch) flue liners and installation kits. Our MI-Flex and 904L Mi-FLEX products are known for their durability and efficiency. Whether you need a coil or a cut length, we have you covered. Our range includes everything from bottom fixings to insulation and reg plates, ensuring a hassle-free installation process. Trust in our products for a safe and efficient fireplace experience.


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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 £3,502.99
Showing 19 of 59 items
Mi-Flexwrap 10m Kit (10m Blanket, 20 Bands, 12m Tape) 180mm or 200mm

Mi-Flexwrap 10m Kit (10m Blanket, 20 Bands, 12m Tape) 180mm or 200mm

90-FW850-10K
£392.99 (including VAT)
In stock
Leca 50L Bag

Leca 50L Bag

90-LECA
£27.99 (including VAT)
In stock
Rockwool Tube - 1000mm long  200mm

Rockwool Tube - 1000mm long 200mm

90-RPS-200
£59.99 (including VAT)
In stock
Aluminium Tape

Aluminium Tape

90-RPS-T
£26.99 (including VAT)
In stock
Vermiculite (100L Bag)

Vermiculite (100L Bag)

90-VERM
£34.99 (including VAT)
In stock
Debris Collar with Nut and Bolt - Ø 175

Debris Collar with Nut and Bolt - Ø 175

94-COLLAR-175
£24.99 (including VAT)
In stock
Register Plate (H) - 900x600, no access holes

Register Plate (H) - 900x600, no access holes

94-REG-H
£51.99 (including VAT)
In stock
Register Plate (J) - 900x600, no access hole - Ø 175 & 200

Register Plate (J) - 900x600, no access hole - Ø 175 & 200

94-REG-J
£43.99 (including VAT)
In stock
Register Plate (K) - 900x600, no access hole - Ø 175 & 200

Register Plate (K) - 900x600, no access hole - Ø 175 & 200

94-REG-K
£49.99 (including VAT)
In stock
Nose Cone - Ø 180

Nose Cone - Ø 180

20-180-NC
£9.99 (including VAT)
Out of stock
Premium PH Cowl (Natural) - Ø 180

Premium PH Cowl (Natural) - Ø 180

20-180-PHCMP
£99.99 (including VAT)
Out of stock
Premium PH Cowl (Terracotta) - Ø 180

Premium PH Cowl (Terracotta) - Ø 180

20-180-PHCMTP
£82.99 (including VAT)
Out of stock
Pot Hanger - Ø 180

Pot Hanger - Ø 180

20-180-PHS
£35.99 (including VAT)
Out of stock
MI-FLEX Square Pot Hanging Cowl (Natural) - Ø 180

MI-FLEX Square Pot Hanging Cowl (Natural) - Ø 180

20-180-SPHCM
£109.99 (including VAT)
Out of stock
MI-FLEX Square Pot Hanging Cowl (Terracotta) - Ø 180

MI-FLEX Square Pot Hanging Cowl (Terracotta) - Ø 180

20-180-SPHCMT
£137.99 (including VAT)
Out of stock
Screw-FIX Adaptor to SW, 1mm - Ø 175

Screw-FIX Adaptor to SW, 1mm - Ø 175

25-175-MAE1
£47.99 (including VAT)
Out of stock
Screw-FIX Pot Hanging Cowl, Natural - Ø 175

Screw-FIX Pot Hanging Cowl, Natural - Ø 175

25-175-PHCM
£84.99 (including VAT)
Out of stock
Screw-FIX Pot Hanger - Ø 175

Screw-FIX Pot Hanger - Ø 175

25-175-PHS
£38.99 (including VAT)
Out of stock
Screw-FIX Top Hat Adaptor - Ø 175

Screw-FIX Top Hat Adaptor - Ø 175

25-175-THA
£48.99 (including VAT)
Out of stock
Your 175MM (7 INCH) Questions Answered

What materials are the 175mm (7 inch) flue liners made of? -

Our 175mm flue liners are made of high-grade stainless steel, particularly 904L Mi-FLEX material known for its corrosion resistance and durability.

Do I need special tools for installing the 175mm flue liners? +

Are the 175mm flue liners suitable for wood-burning stoves? +

How do I determine the right length of flue liner for my fireplace? +

Do you offer warranty on the 175mm flue liners? +

Can I use the 175mm flue liners for gas appliances? +

Are there specific regulations to follow when installing the 175mm flue liners? +

When it comes to fireplace upgrades, investing in high-quality flue liners is crucial for ensuring safety and efficiency. Our 175mm (7 inch) category offers a wide range of options to suit your needs. Whether you are a professional installer or a DIY enthusiast, our products are designed for easy installation. The 904L Mi-FLEX products, in particular, are known for their corrosion resistance and longevity. Browse through our range of flue liners, install kits, fixings, terminals, insulation, and accessories to find everything you need for a successful fireplace upgrade.
Why Buy 175MM (7 INCH) Products
Our 175mm (7 inch) flue liners and installation kits are perfect for a variety of applications. Whether you are installing a new fireplace or upgrading an existing one, our products provide the perfect solution. These products are ideal for both residential and commercial settings, offering superior performance and durability. Our customers trust our 175mm products for their reliability and ease of installation. Upgrade your fireplace with our top-quality flue liners and accessories today.

Trusted By Trade Professionals

Our 175MM (7 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 175MM (7 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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