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

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]
- Info
- Specs
- Install
- FAQs
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 Name | 904L Mi-FLEX 150mm x 1m CUT LENGTH Flue Liner |
Material | 904L Grade Stainless Steel |
Thickness | 0.105mm (inner and outer layers) |
Length | 1m (with options up to 15m available) |
Application | Masonry chimneys for multi-fuel use |
Approvals | HETAS, CE |
Warranty | Lifetime with Screw-FIX accessory usage |
Manufacturer | Mi-Flues Ltd |
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.
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.
