Flex to Twin Wall Adaptor Ø 125
At a Glance
- Seamless connection between MI-Flues multi-fuel liners and TWPro insulated chimneys
- Constructed from 304 and 316 grade stainless steel for durability
- Compressed rockwool insulation (200kg/m3) for optimal heat management
- Fully welded design ensuring robust and secure performance
- Maintains a safe 50mm clearance from combustibles
- HETAS approved and CE marked for safety and compliance
- Easy-to-install screw-fix coupling for reliable attachment

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.
Have Questions?
Phone: 01670 206999
Email: [email protected]
- Info
- Specs
- Install
- FAQs
The Flex to Twin Wall Adaptor Ø 125 is designed for seamless connectivity between MI-Flues multi-fuel liners and TWPro insulated chimneys. Crafted with an outer skin of 304 grade stainless steel and a 316 grade stainless steel inner skin, this adaptor offers robust durability and excellent performance. The insulation consists of compressed rockwool, providing a density of 200kg/m3 for superior heat resistance.
Fully welded for maximum strength, it maintains a safe 50mm distance from combustibles, ensuring your installation meets all safety standards. This HETAS-approved and CE-marked adaptor is perfect for solid fuel, gas, and oil appliances such as woodstoves, gas coal effect fires, and boilers.
SKU: 2-125-101
SKU | 2-125-101 |
---|---|
Item | Flex to Twin Wall Adaptor - u00d8 125 |
Designation: | EN1856-1 T600 N1 W V2 L50040 G50 |
EN1856-1 T200 P1 W V2 L50040 020 | |
System: | TWPro |
Inner Material: | 316L Stainless Steel - 0.40mm thick |
Outer Material: | 304 Stainless Steel - 0.40mm thick |
Fuels: | Wood, Oil, Gas, Low sulpher coal |
Approvals: | HETAS / CE |
Distance To Combustibles: | 50mm |
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Friday, April 4th. 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.
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National Flues Ltd Verdict
The Flex to Twin Wall Adaptor Ø 125 is a top-notch solution for both retail and trade customers looking to securely connect their chimney systems. With our reliable nationwide delivery, you can count on National Flues for quality and affordability.
The Flex to Twin Wall Adaptor Ø 125 is used to connect MI-Flues multi-fuel liners to TWPro insulated chimney systems, ensuring a seamless and secure installation.
National Flues is a leading UK supplier of fireplaces and flues, catering to both retail and trade customers. Renowned for their competitive prices and reliable delivery, National Flues is committed to providing top quality products and exceptional service.
