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Twin Wall to Flex Adaptor Ø 125 (2-125-099)
National Flues presents the Twin Wall to Flex Adaptor Ø 125 – a must-have transitional component designed for seamless integration between traditional TWPro twin wall systems and MI-Flues multi-fuel liners. Ideal for various applications including wood stoves, gas or oil boilers, and solid fuel appliances, this adaptor guarantees a safe, efficient, and robust solution. Benefit from our certified, high-quality chimney accessories that are tailored for reliability and longevity.
In Stock
£67.99
Give us a call if you find it cheaper and we'll try to price match.
At a Glance
Seamless transition from twin wall systems to flexible liners Constructed from high-grade 304 and 316 stainless steel Compressed rockwool insulation (200kg/m³) for optimal heat retention Fully welded design ensuring durability Maintains a safe 50mm clearance from combustibles HETAS approved and CE marked for safety and compliance Designed for both solid fuel and gas/oil appliances
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Please Note: All dimensions refer to the internal diameter of flues.
If unsure, please call 01670 206999 to ensure you choose the correct products.
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 Twin Wall to Flex Adaptor Ø 125 is essential for connecting your chimney and flue system, ensuring a secure transition from TWPro twin wall systems to MI-Flues multi-fuel liners. Specifically designed for use with solid fuel and gas/oil appliances, including wood stoves, gas coal effect fires, and boilers, this adaptor guarantees high efficiency and safety. Constructed with 0.4mm thick outer and inner skins made of 304 and 316 grade stainless steel respectively, it boasts insulation of compressed rockwool with a density of 200kg/m³.
Fully welded for additional durability, every part maintains a safe 50mm distance to combustible materials. TWPro components are HETAS Approved and CE marked, with designations EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 W V2 L50040 O20. Installation is straightforward, requiring a locking band to secure the parts.
Ensure all transitions occur inside an existing class 1 chimney, with no flexible liner visible externally, for optimal performance.
SKU: 2-125-099
Technical Specifications
Model
Twin Wall to Flex Adaptor Ø 125
SKU
2-125-099
Inner Material
316L Stainless Steel, 0.4mm thick
Outer Material
304 Stainless Steel, 0.4mm thick
Insulation
Compressed Rockwool (200kg/m³)
Appliance Compatibility
Wood stoves, gas coal effect fires, oil/gas boilers, and other solid fuel appliances
Approvals
HETAS Approved / CE Marked
Designations
EN1856-1 T600 N1 W V2 L50040 G50, EN1856-1 T200 W V2 L50040 O20
Minimum Clearance To Combustibles
50mm
Installation Requirement
Locking band for secure coupling, inside an existing class 1 chimney
Ensure your installation is carried out within an existing class 1 chimney. The adaptor requires a locking band to secure the connection between the twin wall system and the flexible flue liner. It is critical that a minimum distance of 50mm is maintained from any combustible material, such as wood or plasterboard. During installation, verify that the flexible liner is completely concealed within the chimney structure – it must not be visible externally. Follow all manufacturer guidelines and local building regulations to ensure both performance and safety. Optional accessories, like additional locking bands or custom fittings, are available to further secure and optimise your installation if required.
The Twin Wall to Flex Adaptor Ø 125 is suitable for solid fuel and gas/oil appliances, including wood stoves, gas coal effect fires, oil and gas boilers, and other solid fuel appliances.
This adaptor is made from 304 grade stainless steel for the outer skin and 316 grade stainless steel for the inner skin, both measuring 0.4mm in thickness. It also includes compressed rockwool insulation with a density of 200kg/m³.
Yes, it is HETAS Approved and CE marked, meeting designations EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 W V2 L50040 O20.
Installation is simple with the use of a locking band to secure the parts together. Ensure that there is a 50mm distance from the outside of the flue to any combustible materials and that the transition occurs inside an existing class 1 chimney.
The safe distance to combustibles is 50mm. Ensure no part of the flue is within 50mm of any combustible material like wood or plasterboard.
No, the flexible flue liner should not be visible outside the brick or clay chimney. The transition must be made entirely inside an existing class 1 chimney.
National Flues offers competitive prices, reliable delivery, and excellent service to both retail and trade customers. Our products, including the Twin Wall to Flex Adaptor Ø 125, ensure quality and compliance with industry standards.
Delivery Information +
We work relentlessly to ensure you get your order fast.
Estimated delivery for this product is Tuesday, May 20th. Delivery times of products not in our warehouses depend on product availability and shipping. If you need a definitive delivery time give us a call.
If you need faster stove or fireplace delivery please also give us a call.
We can sometimes 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 Twin Wall to Flex Adaptor Ø 125 buyers guide
Comprehensive Buyers Guide: Twin Wall to Flex Adaptor Ø 125
When upgrading your chimney system, choosing the right adaptor is paramount. The Twin Wall to Flex Adaptor Ø 125 from National Flues is engineered to provide a seamless and secure connection between your existing twin wall system and a new flexible flue liner. This guide is designed to assist both trade professionals and homeowners in understanding the features, benefits, and installation process associated with this key component.
Product Features and Their Benefits
- Seamless Transition: The adaptor is designed to bridge the gap between the TWPro twin wall system and MI-Flues flexible liners, ensuring that your flue installation is efficient and secure. This seamless integration minimises the risk of leaks and ensures a consistent flow of exhaust gases.
- Superior Material Construction: Crafted from 304 and 316 grade stainless steel, both at 0.4mm thickness, the adaptor provides excellent resistance to corrosion and high temperatures. This feature not only extends the life of the unit but also assures you of a sturdy performance in demanding environments.
- Insulated for Efficiency: With the inclusion of compressed rockwool insulation rated at 200kg/m³, the adaptor maintains optimal heat retention. This increased thermal efficiency translates to improved performance and energy savings over time.
- Guaranteed Safety Standards: Safety is a top priority with the Twin Wall to Flex Adaptor Ø 125. The design ensures that all components maintain a safe 50mm distance from combustible materials. This feature, along with HETAS approval and CE marking, reassures you of the adaptor’s compliance with stringent safety standards.
Installation: A Simple and Secure Process
The installation of the Twin Wall to Flex Adaptor is straightforward, but it is essential to adhere to specific guidelines for optimum safety and performance:
- Positioning: Always install the adaptor inside an existing class 1 chimney, ensuring that all components are housed within the correct structure.
- Securing the Connection: Use the recommended locking band to secure the adaptor to the flexible flue liner. This ensures that the connection remains robust even under operational stresses.
- Maintaining Clearance: Keep a minimum distance of 50mm from any combustible surfaces. This precaution is critical in preventing fire hazards and ensuring compliance with safety standards.
- Professional Consultation: If you are unsure about the installation process, it is advisable to consult with a qualified installer or refer to the detailed installation manual provided by National Flues.
Compatibility and Optional Accessories
The Twin Wall to Flex Adaptor Ø 125 is designed to work with a wide range of solid fuel and gas/oil appliances, including wood stoves, coal effect fires, and various boilers. While the adaptor serves as a critical component in your chimney system, you might also consider exploring additional optional accessories. For instance, enhanced locking bands and custom fittings can further secure your installation, providing an extra layer of assurance, especially in demanding installations.
National Flues also offers a range of complementary products that are engineered to work in harmony with the adaptor. By combining these accessories, you can optimise the safety and efficiency of your entire flue system. Should you need further assistance, our experts are on hand to recommend the best optional accessories tailored to your installation needs.
Why Choose National Flues?
National Flues is a market leader in chimney and flue accessories in the UK. With a track record for excellence in safety, performance, and customer satisfaction, our products are designed to meet the requirements of both residential and commercial installations. The Twin Wall to Flex Adaptor Ø 125 is just one example of our commitment to quality, bringing together innovative design and industry-leading materials.
In addition to our top-tier products, we offer nationwide delivery and unbeatable prices. Our customer service team is always ready to provide tailored advice, ensuring that you have all the information you need to make a confident purchase. Whether you are installing a new system or upgrading an existing one, National Flues has the solutions you require.
Addressing Common Concerns
- Installation Complexity: Our detailed installation instructions and support from experienced professionals mean that even complex installations can be handled with ease. We encourage homeowners and contractors alike to take advantage of our extensive guidance.
- Product Durability: Constructed from high-grade stainless steel and featuring robust insulation, this adaptor is built to withstand the demanding conditions of modern flue systems. It is an investment in long-term reliability and safety.
- Safety Compliance: With all parts designed to maintain a 50mm clearance from combustible materials and certified to meet industry standards, you can rest assured that safety is never compromised.
Final Thoughts
Investing in the Twin Wall to Flex Adaptor Ø 125 is a proactive step toward ensuring that your chimney system operates safely and effectively. By selecting a product that prioritises quality, durability, and performance, you are making a wise decision that will benefit your property for years to come.
National Flues combines cutting-edge technology with tried and tested safety measures to deliver a product that stands out in the market. If you are ready to make a change, consider the enhanced performance that optional accessories bring to your overall installation. They complement the adaptor perfectly and guarantee an even higher standard of excellence.
Make an informed decision with a product that meets all modern safety and performance standards. Add the Twin Wall to Flex Adaptor Ø 125 to your system and experience the difference in quality and peace of mind. buy now or call 01670 206 999.
Secure your installation with this essential adaptor – order today and upgrade your chimney system!
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