Flat Increasing Adaptor - Ø 80 - Ø 125
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

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 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
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 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.
