× National Flues
We Won't Be Beaten On Price.
Free Delivery on Orders Over £100
100% 5 Star Reviews on Trustpilot
Free Flue Design Service Available
Need Help? 01670 206999 (8am-5pm)

Flex to Twin Wall Adaptor Ø 125 (2-125-101)

National Flues brings you the reliable Flex to Twin Wall Adaptor Ø 125, an essential accessory designed to securely connect MI-Flues multi-fuel liners to TWPro insulated chimneys. This high-quality chimney adaptor, constructed from premium stainless steel and enhanced with compressed rockwool insulation, offers unparalleled durability and safety. Perfect for woodstoves, gas fires, and a range of solid fuel appliances, this product is a must-have for those seeking a secure and efficient chimney system upgrade.
Hover to Zoom / Click for Gallery
£48.49
Give us a call if you find it cheaper and we'll try to price match.

 

Payment Options

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]

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

SKU2-125-101
ItemFlex 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
The installation of the Flex to Twin Wall Adaptor Ø 125 is straightforward when following the recommended guidelines. Begin by ensuring that the adaptor is secured entirely within a class 1 chimney to keep the flex components concealed. Attach the adaptor using the provided screw-fix coupling system and confirm that the fully welded joints are properly aligned. Always check for a minimum clearance of 50mm from any combustible material. If any uncertainties arise during installation, it is advisable to consult with a professional installer to ensure safe and compliant integration.

It is used to provide a secure connection between MI-Flues multi-fuel liners and TWPro insulated chimneys for various fuel appliances.

Yes, it is suitable for use with gas appliances, including gas fires and boilers.

The outer skin is made from 304 grade stainless steel, while the inner skin is made from 316 grade stainless steel. The insulation is compressed rockwool.

Yes, it maintains a safe distance of 50mm from any combustible materials such as wood or plasterboard.

It is HETAS approved and CE marked, ensuring it meets high safety and performance standards.

The adaptor is secured using a locking band to ensure a tight and secure fit.

No, the transition must be made inside an existing class 1 chimney, and no part of the flex should be visible outside the chimney.
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Wednesday, April 30th. 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 Flex to Twin Wall Adaptor Ø 125 buyers guide

Upgrade your chimney system now – add to your cart or call 01670 206 999.

Your recently viewed products:

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