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316L Mi-FLEX 200mm x 1m CUT LENGTH (35Z-200-1)

National Flues proudly presents the 316L Mi-FLEX 200mm x 1m CUT LENGTH flue liner – a premium, flexible chimney relining solution designed for homes and trade professionals alike. Engineered from high-grade 316L stainless steel, this innovative liner delivers robust performance and safety for a range of fuel types including gas, oil, and solid fuels. Ideal for relining masonry chimneys, its double-skinned construction and Omega-Lock seam ensure durability and reliability. Discover an industry-leading solution that combines modern engineering with traditional craftsmanship.
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£31.49
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At a Glance

  • Constructed from premium 316L stainless steel (0.105mm thick inner and outer layers).
  • Double-skinned design with a smooth inner lining and convoluted outer skin.
  • Omega-Lock seam for enhanced durability and leak-free performance.
  • Approved by HETAS and CE, ensuring safety and compliance.
  • Lifetime manufacturer’s warranty when installed with Screw-FIX accessories.

We Won't Be Beaten On Price

At National Flues, we continuously monitor competitor prices. This ensures that we consistently offer you the best deals on all our products. Here’s how we keep your costs low:

  • Daily Price Matching: Our team adjusts prices to ensure we stay competitive.
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Price Match Guarantee: If you find the same product cheaper within 48 hours, we’ll match it and refund the difference.

Free Delivery Over £100: Orders over £100 are free delivery (call us if delivery is required outside the mainland UK).

“I saved 20% on my purchase compared to other retailers. Exceptional service!” – Jane D.

Have Questions?
Phone: 01670 206999
Email: [email protected]

The 316L Mi-FLEX 200mm x 1m CUT LENGTH flexible flue liner is ingeniously designed for relining masonry chimneys. Crafted from premium-grade 316L stainless steel, this liner boasts a double-skinned construction — a smooth inner lining and a convoluted outer skin, both 0.105mm thick. Its durable construction features the Omega-Lock seal, formed by bending a single strip of steel at 180 degrees and folding the seam in four planes.

Approved by HETAS and CE, this flue liner is ideal for burning gas, oil, coal, coke, cured dry logs, and cured dry peat. The flue liner is designed for top-down installation, with the gas flow arrows ensuring proper fit. Regular maintenance, including chimney sweeping at least once a year, ensures optimal performance and longevity.

SKU: 35Z-200-1

Technical Specifications
Dimensions200mm x 1m (Cut Length)
Material316L Stainless Steel
Thickness0.105mm (both inner and outer layers)
ConstructionDouble-skinned with Omega-Lock seam
ApprovalsHETAS, CE
WarrantyLifetime (with Screw-FIX accessories)
Fuel CompatibilityWood, Oil, Gas, Low sulphur coal, Coke, Cured dry logs, Cured dry peat
ManufacturerMi-Flues Ltd
InstallationTop-down installation with gas flow indicator arrows
The 316L Mi-FLEX liner is designed for top-down installation. Begin by positioning the liner at the top of your chimney, ensuring that the gas flow arrows point upward for correct installation. A nose cone attached to a string can aid in guiding the liner smoothly down the chimney. It is essential to use professional installation techniques and, where recommended, Screw-FIX accessories to secure the liner and maintain the lifetime warranty. Regular annual sweeping and maintenance of chimneys, especially those serving solid fuel appliances, is advised to keep the liner operating at optimal performance. Always consult a qualified technician if you encounter any difficulties during installation.

The 316L Mi-FLEX flue liner can handle gas, oil, coal, coke, cured dry logs, and cured dry peat.

It features a double-skinned construction with a smooth inner lining and a convoluted outer skin, both made from 316L stainless steel and 0.105mm thick.

Yes, it is approved by HETAS and CE.

The liner should be fitted from the top, with gas flow arrows pointing upwards. A nose cone attached to a string can aid in pulling the liner down the chimney.

It is recommended to sweep and maintain chimneys serving solid fuel appliances at least once a year.

The Omega-Lock seal is formed by bending a single strip of steel at 180 degrees and folding the seam in four planes, offering enhanced durability.

Yes, it carries a lifetime manufacturer’s warranty when installed with Screw-FIX accessories.
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, April 29th. If you need faster stove or fireplace delivery please give us a call. We can often reduce longer lead times if we pay the carrier £25 for express delivery. Visit our Shipping Information page for more information.

Warranty & Returns +

All our products come with warranties. Mi-Flex offers a lifetime guarantee. Returns for damaged items are covered by insurance; non-damaged returns incur return delivery costs.

Price Match Guarantee +

We will match any price like for like on a retail basis. Give us a call if you find it cheaper and want to buy from us.

Read our review in our 316L Mi-FLEX 200mm x 1m CUT LENGTH buyers guide

Ensure your chimney’s safety and efficiency by choosing the 316L Mi-FLEX liner today – a decision that pays dividends in performance and durability.

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