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Flat Increasing Adaptor - Ø 80 - Ø 125 (2-80-008)

National Flues presents the Flat Increasing Adaptor - Ø 80 to Ø 125, an ideal solution for connecting various solid fuel or gas/oil appliances, including woodstoves, pellet stoves, and oil/gas boilers, to a TWPro flue system. This high-quality flue connector is designed for a seamless transition in your chimney setup and represents the perfect blend of safety, durability, and efficiency. As a reputable supplier in the UK, National Flues ensures that every component, including our flue adaptors, complies with industry standards such as HETAS and CE markings. Whether upgrading your current system or installing a new one, the Flat Increasing Adaptor is the smart choice for a secure and reliable Read more...
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At a Glance

  • Constructed with 304-grade stainless steel (outer) and 316-grade stainless steel (inner) for lasting durability
  • Features 0.4mm thick skins for robust performance
  • Compressed rockwool insulation with a density of 200kg/m³ for optimal thermal control and safety
  • Fully welded design ensures a secure and leak-free connection
  • HETAS approved and CE marked, ensuring compliance with stringent safety standards
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Friday, August 15th. This is based on current lead times for this product. If you need a stove, or other bulky product, to be delivered by a specific time in the next 7 days, then please give us a call on 01670 206 999. We can sometimes 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 and you can read in our blog about they types and terms and conditions for warranties. Mi-Flex flue liner, for example, comes with a lifetime guarantee. Give us a call if you want to know about a specific warranty. Returns for damaged items are covered by insurance; non-damaged returns incur return delivery costs.

Best 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.

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 Flat Increasing Adaptor - Ø 80 to Ø 125 is an essential component for connecting your solid fuel or gas/oil appliances to your flue system. Suitable for use with woodstoves, gas coal effect fires, oil and gas boilers, and other solid fuel appliances, this adaptor ensures a seamless transition. Constructed with 304-grade stainless steel for the outer skin and 316-grade stainless steel for the inner skin, both at 0.4mm thickness, it promises durability and strength.

The compressed rockwool insulation boasts a density of 200kg/m3, ensuring optimal performance and safety. Fully welded for additional reliability, the adaptor maintains a safe distance of 50mm to combustibles. Additionally, the TWPro system, including this adaptor, is HETAS approved and CE marked, adhering to the highest standards of safety and quality.

SKU: 2-80-008

Technical Specifications
Materials304-grade stainless steel (outer), 316-grade stainless steel (inner)
Skin Thickness0.4mm (each layer)
InsulationCompressed rockwool with 200kg/m³ density
Diameter TransitionØ 80 to Ø 125 (50mm increase)
ComplianceHETAS approved, CE marked
Combustible ClearanceMinimum 50mm from combustibles
Installation is straightforward but requires careful attention to manufacturer guidelines. Begin by verifying the dimensions and compatibility of your existing flue system with the adaptor. Ensure that all surfaces are clean and free from debris before welding or fixing the adaptor. Use the following steps as a guide: 1. Measure the inlet and outlet diameters to confirm they meet the Ø 80 and Ø 125 specifications. 2. Position the adaptor to ensure a 50mm clearance from any combustible material. This gap is critical for safety. 3. Secure the adaptor using appropriate sealing compounds and, if necessary, additional insulation accessories. 4. Inspect all welds and joints for integrity after installation. 5. Test the connection for any signs of leakage or misalignment before finalising the installation. Optional accessories such as sealing tape, additional insulation, or mounting brackets may be required for a customised installation. Please consult with our support team or product documentation for further details.

The adaptor is suitable for solid fuel and gas/oil appliances such as woodstoves, gas coal effect fires, oil and gas boilers, and other solid fuel appliances.

The outer skin is made from 304-grade stainless steel and the inner skin from 316-grade stainless steel, both with a thickness of 0.4mm.

The insulation is made from compressed rockwool with a density of 200kg/m3.

Yes, the adaptor is HETAS approved and CE marked, complying with EN1856-1 standards.

The minimum distance to combustibles for this adaptor is 50mm.

Yes, National Flues supplies this adaptor to both retail and trade customers nationwide and offers trade accounts.

The adaptor is designed for easy installation, connecting the appliance outlet or SW to the TWPro flue system with a flat design for a seamless transition.

What our experts say!

"The Flat Increasing Adaptor - Ø 80 to Ø 125 stands out for its robust construction and ease of installation. Ideal for both retail and trade customers, it is rarely beaten on price and comes with our reliable nationwide delivery."

The Flat Increasing Adaptor - Ø 80 to Ø 125 is used for connecting your solid fuel or gas/oil appliance to a larger diameter flue system, ensuring a seamless and efficient transition.

National Flues is a reputable supplier of high-quality fireplaces and flues throughout the UK, offering competitive prices, reliable delivery, and exceptional customer service to both retail and trade customers.

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