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316L Mi-FLEX 125mm x 1m CUT LENGTH (35Z-125-1)
National Flues proudly presents the 316L Mi-FLEX flue liner, a premium solution engineered for relining masonry chimneys. This flexible, high-performance stainless steel liner is designed for multi-fuel use and is an ideal choice for homeowners and trade professionals alike. With its robust dual-layer design and Omega-Lock sealed join, this product ensures superior durability and efficiency. Trusted throughout the UK for its proven performance and energy-saving benefits, the 316L Mi-FLEX flue liner is synonymous with quality and reliability.
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£14.49
Give us a call if you find it cheaper and we'll try to price match.
At a Glance
Premium 316L stainless steel construction (inner & outer layers at 0.105mm thick)
Versatile multi-fuel compatibility including gas, oil, coal, coke, cured dry logs and cured dry peat
Omega-Lock sealed for exceptional durability and performance
HETAS and CE approved ensuring top safety and quality standards
Lifetime manufacturer’s warranty when installed with Screw-FIX accessories
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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.
The 316L Mi-FLEX 125mm x 1m CUT LENGTH is a highly versatile flue liner, perfect for relining masonry chimneys. Made to cater to a wide range of fuels including gas, oil, coal, coke, cured dry logs, and cured dry peat, this flue liner is as functional as it is durable. Featuring a double skinned design, it has a smooth inner liner and a convoluted outer skin, both crafted from 316L grade stainless steel with a thickness of 0.105mm.
This robust construction is achieved from a single strip of steel, bent at 180 degrees, and seamlessly Omega-Lock sealed for maximum strength and durability. Our flue liner is proudly HETAS and CE approved, ensuring it meets the highest safety and performance standards. Installation is straightforward - simply ensure your chimney is clean, the pot is secure, and follow our step-by-step guide.
Remember to use the Nose Cone for the best results, which is sold separately. Proper maintenance is key; sweeping your chimney at least once a year is highly recommended.
Before installation, ensure your chimney is thoroughly cleaned and free from debris. Secure the appliance pot firmly and follow the provided step-by-step installation guide. Always install from the top of your masonry chimney, ensuring that the directional arrows on the 316L Mi-FLEX liner face upwards. For optimal sealing and performance, remember to use the Nose Cone accessory, which is available separately. It is essential to maintain safety by having your chimney swept and inspected at least once a year to prevent blockage or creosote build-up.
The 316L Mi-FLEX flue liner is compatible with gas, oil, coal, coke, cured dry logs, and cured dry peat.
Yes, the 316L Mi-FLEX flue liner is approved and listed by HETAS, ensuring it meets high safety and performance standards.
The flue liner should be installed from the top of the chimney, ensuring that the arrows on it point upwards. Secure a piece of string to the Nose Cone and carefully feed the liner down the chimney.
Both the inner and outer liners of the 316L Mi-FLEX flue liner are 0.105mm thick, offering durability and efficiency.
Yes, the 316L Mi-FLEX flue liner is specifically designed for relining within masonry chimneys.
We recommend having your chimney swept and maintained at least once a year, especially if it's serving solid fuel appliances.
Yes, the 316L Mi-FLEX flue liner comes with 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 125mm x 1m CUT LENGTH buyers guide
Comprehensive Buyers Guide for the 316L Mi-FLEX Flue Liner
When investing in a flue liner, it is essential to choose a product that not only meets industry standards but also offers longevity, versatility, and ease of installation. The 316L Mi-FLEX flue liner from National Flues ticks all these boxes and more. In this guide, we will explore the key benefits, installation details, and overall value that this product delivers.
Understanding the Product
At the heart of the 316L Mi-FLEX flue liner is the use of premium 316L stainless steel, chosen for its excellent resistance to corrosion and high temperatures. The liner features a double-skinned design with a smooth inner layer and a convoluted outer layer. This construction ensures that heat is efficiently contained within the flue, thereby improving performance while minimising energy loss. The product has been engineered to accommodate a wide range of fuels—from gas and oil to coal, coke, cured dry logs, and even cured dry peat. Such versatility makes it an ideal solution for various heating systems and climates.
Safety and Approvals
Safety is paramount, especially when dealing with heating appliances. The 316L Mi-FLEX flue liner is HETAS approved and CE marked, ensuring that it meets stringent UK safety and performance criteria. These certifications provide reassurance that the product is thoroughly tested and compliant with international standards. For homeowners and industry professionals, this means a reliable and risk-free operation that stands the test of time.
Installation Insights
Installing the 316L Mi-FLEX flue liner is a straightforward process. However, to guarantee seamless functionality and longevity, it is crucial to adhere to the recommended installation procedures. Start by ensuring that your chimney is clean and free from obstructions. Next, secure the appliance pot and carefully guide the liner from the top of the chimney, making sure that the directional arrows point upwards. One important accessory to consider is the Nose Cone, which, though sold separately, plays a vital role in optimising the installation outcome. Regular maintenance, including an annual chimney sweep, further contributes to safe and efficient operation.
Key Features and Benefits
- Durability: Thanks to its robust construction using high-grade stainless steel, the 316L Mi-FLEX liner is built to last, reducing the need for frequent replacements and ensuring tranquillity for years.
- Energy Efficiency: The dual-layer design not only enhances safety by retaining heat within the flue but also contributes to improved energy efficiency, making your heating system more cost-effective in the long run.
- Versatility: Designed to work with multiple fuel sources, this flue liner offers unparalleled adaptability, meeting the diverse needs of both residential and commercial installations.
- Ease of Use: With an intuitive installation process and clear step-by-step guidance, even those with limited DIY experience can install the liner confidently. When paired with additional accessories like the Nose Cone and Screw-FIX systems, installation becomes even more straightforward.
- Lifetime Warranty: Providing a lifetime warranty, this flue liner demonstrates National Flues’ commitment to quality. This warranty is valid when the liner is installed with the recommended Screw-FIX accessories, offering peace of mind that your investment is protected.
Considerations Before Purchase
Before making your purchase, it is crucial to assess the compatibility of the 316L Mi-FLEX flue liner with your existing chimney setup. Verify that your chimney is clean and structurally sound, as any debris or damage could affect installation and performance. For custom installations, particularly in older or uniquely configured buildings, consulting a professional may be advisable. Additionally, consider the optional accessories available, such as the Nose Cone and extended lengths beyond the standard 1m cut length, which can further optimise your installation according to your specific requirements.
Why National Flues?
National Flues stands as a leading supplier of flue liners and related accessories across the UK. Known for their competitive pricing, efficient nationwide delivery, and exemplary customer service, they provide exemplary value for both trade professionals and homeowners. The 316L Mi-FLEX flue liner is a testament to this commitment, offering a product that merges advanced engineering with practical ease of installation, all while ensuring ultimate safety and energy efficiency.
Concluding Thoughts
In summary, the 316L Mi-FLEX flue liner is an outstanding investment for anyone seeking to enhance the performance and safety of their chimney. Its premium construction, combined with industry-leading approvals and a lifetime warranty, makes it both a smart and dependable choice. The ease of installation means that it can be integrated seamlessly into most masonry chimneys, while its compatibility with a wide range of fuels ensures that it meets diverse heating needs. With the added benefit of optional accessories to further tailor your system’s performance, the 316L Mi-FLEX flue liner is a comprehensive solution for modern heating challenges.
For those who value quality, reliability, and efficiency, this flue liner stands out as an exceptional choice in the market. Whether you are upgrading an existing chimney or planning a new installation, the 316L Mi-FLEX offers the performance and durability you can rely on. Its thoughtful engineering makes it an indispensable part of any modern home or commercial heating system.
Buy now or call 01670 206 999.
Secure the safety and performance of your chimney; order the 316L Mi-FLEX today and experience excellence in flue lining.
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