× National Flues
We Will NOT Be Beaten on Price.
Free Delivery on Orders Over £100
5 Star Reviewed on Trustpilot
Free Flue Design Service Available
Help? 01670 206999 (8am-5pm)

904L Mi-FLEX 150mm x 1m CUT LENGTH

The 904L Mi-FLEX 150mm x 1m Flue Liner by National Flues is a premium quality, multi-fuel flue liner ideal for relining masonry chimneys. Crafted from superior 904L stainless steel, this flue liner meets UK safety standards with HETAS and CE approval, ensuring both durability and efficiency. Perfect... More...
Hover to Zoom / Click for Gallery

At a Glance

  • - Made from high-grade 904L stainless steel for superior durability
  • - Double-skinned design with 0.105mm thickness on both inner and outer layers
  • - HETAS and CE approved for safety and quality assurance
  • - Suitable for multi-fuel applications including gas, oil, coal, coke, cured dry logs, and smokeless fuels
  • - Lifetime warranty when paired with our Screw-FIX accessories
Now only £35.99
Including VAT Buy with confidence. If you find this cheaper within 48 hours of checkout, we'll refund the difference.
Payment Options

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.
  • Bulk Purchasing Power: We sell a lot, so we can negotiate better rates with suppliers, passing the savings directly to you.
  • Operational Efficiency: We have streamlined processes to reduce overhead.

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 904L Mi-FLEX 150mm x 1m Flue Liner from National Flues is a double-skinned, flexible flue liner ideal for relining masonry chimneys. Crafted from 904L grade stainless steel, both the inner and outer layers boast a thickness of 0.105mm, ensuring durability and longevity. The smooth inner liner coupled with a convoluted outer skin not only meets but exceeds performance expectations.

This liner supports burning gas, oil, coal, coke, cured dry logs, cured dry peat, and approved smokeless fuels. Recognized by HETAS and CE approved, you can be assured of its quality and safety. Installation is straightforward: always fit from the top, ensure arrows point upwards (indicating the gas flow), and use a Nose Cone and string for smooth insertion.

Regular maintenance is essential, especially for chimneys serving solid fuel appliances, and sweeping at least once a year is recommended for optimal performance.

SKU: 36Z-150-1

Technical Specifications
Product Name904L Mi-FLEX 150mm x 1m CUT LENGTH Flue Liner
Material904L Grade Stainless Steel
Thickness0.105mm (inner and outer layers)
Length1m (with options up to 15m available)
ApplicationMasonry chimneys for multi-fuel use
ApprovalsHETAS, CE
WarrantyLifetime with Screw-FIX accessory usage
ManufacturerMi-Flues Ltd
Installation should always be carried out from the top downwards. Ensure that the arrows on the liner indicating the gas flow are pointed upwards. For an efficient installation, secure a string to the provided Nose Cone, and gently pull the liner through the chimney with assistance from above. Regular maintenance is advised, especially if the chimney services solid fuel appliances – a yearly sweep is recommended to maintain optimal performance and safety. Be sure to check that all recommended accessories, such as the Screw-FIX system, are used to guarantee the lifetime warranty.

Yes, the 904L Mi-FLEX 150mm x 1m Flue Liner is suitable for use with gas, oil, coal, coke, cured dry logs, cured dry peat, and approved smokeless fuels.

To ensure a proper fit, pull down a small section of the diameter liner you plan to use to check the fit within your chimney.

Yes, our 904L Mi-FLEX flue liner is HETAS approved and also holds CE approval, underscoring its quality and safety standards.

Installation involves fitting from the top, ensuring the arrows point upwards (indicating gas flow), securing a string to the Nose Cone, and carefully pulling the liner through the chimney with someone feeding it down from the top.

For chimneys serving solid fuel appliances, it's recommended to sweep and maintain the chimney at least once a year to ensure optimal performance and safety.

904L stainless steel is used for its superior corrosion resistance, strength, and longevity, making it ideal for a variety of fuel types and ensuring long-lasting performance.

We recommend using a Nose Cone and string for smooth installation. Additionally, using Screw-FIX accessories will help you take full advantage of the lifetime manufacturer's warranty.
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Thursday, April 3rd. 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. If you find it cheaper within 48 hours, we'll refund the difference.

Read our buyers guide for this 904L Mi-FLEX 150mm x 1m CUT LENGTH

National Flues Ltd Verdict

At National Flues, we pride ourselves on providing top-tier flue liners. The 904L Mi-FLEX 150mm x 1m Flue Liner is a standout choice for its superior build and versatility. Delivering nationwide, we cater to both retail and trade customers with unbeatable prices and reliable service.

The 904L Mi-FLEX 150mm x 1m Flue Liner is designed for relining masonry chimneys to provide a reliable and versatile solution for multi-fuel burning applications.

National Flues is a leading supplier of high-quality flue liners and fireplaces, serving retail and trade customers across the UK. Known for unbeatable prices and reliable delivery, National Flues is committed to providing top-notch products and excellent customer service.

 

Our Rating Image

Upgrade your chimney with the premium 904L Mi-FLEX Flue Liner today – add to cart now for a reliable, efficient heating solution!

Your recently viewed products:

Multiple Payment Options- including Klarna, Clearpay, Mastercard, Visa and Paypal
Free Design Service