Flex to Twin Wall Adaptor Ø 100
At a Glance
- Constructed from 304 and 316L stainless steel for superior durability
- Compressed rockwool insulation (200kg/m³) ensures excellent heat retention
- Secure screw-fix coupling design for a watertight connection within Class 1 chimneys
- HETAS approved and CE marked, meeting rigorous safety standards
- Designed to maintain a safe 50mm gap from combustible materials

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 100 is an essential fitting for both solid fuel and gas/oil appliances, including woodstoves, gas coal effect fires, oil and gas boilers, and other solid fuel applications. This high-quality adaptor features an outer skin made from robust 304 grade stainless steel, with a 0.4mm thickness, and an inner skin crafted from durable 316 grade stainless steel, also 0.4mm thick. The insulation is composed of compressed rockwool, ensuring a density of 200kg/m³.
The highly resilient and fully welded parts are designed to maintain a safe distance of 50mm from combustible materials. Moreover, the TWPro range is both HETAS approved and CE marked, ensuring that it meets stringent safety and performance criteria. It boasts impressive designation numbers: EN1856-1 T600 N1 W V2 L50040 G50, and EN1856-1 T200 W V2 L50040 O20.
Installation is straightforward, with the parts secured using a reliable locking band. Always maintain a 50mm gap from the flue's exterior to any flammable materials, such as wood or plasterboard.
SKU: 2-100-101
Technical Specifications | |
---|---|
SKU | 2-100-101 |
Outer Material | 304 Stainless Steel, 0.40mm thick |
Inner Material | 316L Stainless Steel, 0.40mm thick |
Insulation | Compressed rockwool, 200kg/mu00b3 |
Approvals | HETAS / CE |
Designation Numbers | EN1856-1 T600 N1 W V2 L50040 G50, EN1856-1 T200 W V2 L50040 O20 |
Distance To Combustibles | 50mm |
Coupling Type | Screw-fix locking band |
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 100 is an indispensable component for any chimney system. National Flues proudly delivers this highly-rated adaptor nationwide, catering to both retail and trade customers with unbeatable prices and reliable delivery.
This adaptor is used to connect a flexible flue liner to a twin wall system, ensuring a secure and reliable transition within an existing Class 1 chimney.
National Flues is a trusted supplier of high-quality fireplaces and flues to both retail and trade customers across the UK. Renowned for competitive prices, reliable delivery, and exceptional customer service, National Flues is a go-to source for all your chimney system needs.
