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Pipe 100mm Ø 125 (2-125-018)

National Flues presents the Pipe 100mm Ø 125 twin wall insulated chimney flue pipe, an ideal choice for both solid fuel and gas/oil heating appliances. This highly efficient, insulated chimney flue pipe is designed for durability and safety, ensuring excellent performance and compliance with required standards.
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£31.49
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At a Glance

  • 100mm Ø 125 twin wall insulated chimney flue pipe
  • Double-layer stainless steel construction (304 outer, 316 inner, 0.40mm each)
  • Compressed rockwool insulation (200kg/m3) for superior thermal efficiency
  • Fully welded design ensuring long-lasting durability
  • HETAS Approved and CE marked with EN1856-1 designations
  • Effective installed length of 65mm, ideal for various heating appliances

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.
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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 100mm Ø 125 Twin Wall Insulated Chimney Flue Pipe is designed for seamless integration with solid fuel and gas/oil appliances, such as wood stoves, gas coal effect fires, and oil and gas boilers. Constructed with a 0.4mm thick outer skin of 304-grade stainless steel and an inner skin of 0.4mm thick 316-grade stainless steel, this flue pipe promises durability and outstanding performance. The insulation comprises compressed rockwool with a density of 200kg/m3, ensuring superior thermal efficiency.

Fully welded for maximum strength and safety, this pipe maintains a safe distance of 50mm from any combustible materials. Moreover, the TWPro system is HETAS Approved and CE marked, with designation numbers EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 W V2 L50040 O20, guaranteeing compliance with safety standards. Installation is straightforward, requiring only a Locking Band to securely fix the components together.

SKU: 2-125-018

Technical Specifications
Inner Material316L Stainless Steel (0.40mm)
Outer Material304 Stainless Steel (0.40mm)
InsulationCompressed Rockwool (200kg/m3)
DesignationsEN1856-1 T600 N1 W V2 L50040 G50, EN1856-1 T200 W V2 L50040 O20
Effective Installed Length65mm
Clearance From Combustibles50mm
ApprovalsHETAS / CE
This chimney flue pipe is designed with ease of installation in mind. The fully welded components join together securely with a Locking Band, ensuring a reliable connection. During installation, ensure that the pipe maintains a minimum clearance of 50mm from any combustible materials. Always follow the manufacturer’s instructions and local building regulations to ensure a safe, efficient, and compliant setup.

This flue pipe is suitable for solid fuel and gas/oil appliances, including wood stoves, gas coal effect fires, oil, and gas boilers.

The outer skin is made from 304-grade stainless steel, and the inner skin is made from 316-grade stainless steel, both 0.4mm thick. The insulation is compressed rockwool with a density of 200kg/m3.

Maintain a distance of 50mm from the outside of the flue to any combustible material, such as wood or plasterboard.

Yes, the TWPro system, including this flue pipe, is HETAS Approved and CE marked, meeting all necessary safety standards.

The designation numbers are EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 W V2 L50040 O20.

The effective installed length of the 100mm Ø 125 Twin Wall Insulated Chimney Flue Pipe is 65mm.

The TWPro Twin Wall Insulated Chimney parts are secured together using a Locking Band.
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 Pipe 100mm Ø 125 buyers guide

Don’t miss out on the best chimney flue available – secure your installation now!

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