Pipe 100mm Ø 100
At a Glance
- Twin wall insulated construction for excellent thermal performance
- Durable build with 304 outer and 316 inner stainless steel
- HETAS approved and CE marked for safety and reliability
- High-density compressed rockwool insulation (200kg/m³) for efficient heat retention
- Quick and secure Locking Band installation system

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: sales@nationalflues.com
- Info
- Specs
- Install
- FAQs
The 100mm TWPro Twin Wall Insulated Chimney Flue Pipe is designed for use with solid fuel and gas/oil appliances, such as woodstoves, gas coal effect fires, and boilers. Featuring an outer skin made from 304 grade stainless steel and an inner skin from 316 grade stainless steel, both parts are 0.4mm thick. The insulation is composed of compressed rockwool with a density of 200kg/m³, ensuring excellent thermal performance.
All components are fully welded, enhancing durability and safety. It is crucial to maintain a 50mm distance from combustibles. This HETAS approved and CE marked pipe stands up to rigorous quality standards with designations EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 W V2 L50040 O20.
Installation is straightforward with a Locking Band system, providing ease and security.
SKU: 2-100-018
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, April 8th. 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.
Compatible and other products that may be of interest...
National Flues Ltd Verdict
The 100mm TWPro Twin Wall Insulated Chimney Flue Pipe is a top-notch product in our range. It’s robust, reliable, and versatile. Whether you're installing it in a home or a commercial setting, its quality is assured. We seldom beat on price and pride ourselves on a dependable delivery service across the UK. Available for both retail and trade customers.
The 100mm TWPro Twin Wall Insulated Chimney Flue Pipe is intended for safe and effective venting of solid fuel, gas, and oil appliances.
National Flues is a leading supplier of high-quality fireplaces and flues, serving both retail and trade customers across the UK with reliable products and exceptional service.
