Increasing MI-FLEX Adaptor - Ø 80-Ø 100 (20-80-MR)
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Fast deliveryMonday, November 17th*
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Best PriceCall us to beat any price you found online.
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At a Glance
- 6mm 316L stainless steel construction
- Seamless 25mm transition from ridged single wall to MI-FLEX liners
- Gas-tight seal when used with approved high-temperature sealants
- Rated for appliance temperatures up to 600°C (T600 designation)
- Compliant with BSEN 1856-2, HETAS, CE and Building Regulations Document J
- Versatile compatibility with wood (sub 20% moisture), oil, gas, and smokeless coal appliances
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
- Details
- Specs
- Install/Packs
- FAQs
The Increasing MI-FLEX Adaptor - Ø 80 to Ø 100, crafted from 0.6mm 316 stainless steel, is an essential accessory for a complete and secure chimney system. This adaptor is designed to connect your rigid single wall flue system to the MI-FLEX flexible flue liners, ensuring a smooth and reliable transition. Not only does it provide an increase of 25mm from the single wall to the flexible flue liner, but it also guarantees a gas-tight seal when used with appropriate sealants like fire cement, ceramic rope, or high-temperature sealant.
This adaptor is suitable for use with high-temperature appliances up to 600°C and is compliant with Building Regulations Document J. Perfect for wood (with less than 20% moisture), smokeless coal, gas, and oil appliances. For effective installation, it must be used within a masonry chimney, ensuring no exposed flex.
Additionally, the system must be designed for easy sweeping and maintenance, which should be carried out by competent professionals at least once a year for all fuels, and twice for solid fuels.
SKU: 20-80-MR
Delivery Information* +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Monday, November 17th. This is based on current lead times. Bear in mind that it is a busy time of year. If you need a product delivered by a specific time in the next 7 days, then please give us a call on 01670 206 999. Visit our Shipping Information page for more information.
About National Flues Ltd +
We began over 30 years ago as a fireplace shop in the North East. We now supply hundreds of trade professionals and thousands of retail customers, all across the UK, every month. We are still a family owned business, lead by the MD Neil, and always try our best to deliver the best possible experience. We also price match, so give us a call if you find this cheaper and want to buy from us. Visit our about us page to read a bit more.
This is us — real advice over the phone, or at the counter, and real stock in our warehouse.
| Technical Specifications | |
|---|---|
| Material | 0.6mm 316L Stainless Steel |
| Size | Ø 80 to Ø 100 (25mm increase) |
| Temperature Rating | Up to 600°C (T600) |
| Fuel Compatibility | Wood (<20% moisture), Oil, Gas, Smokeless Coal |
| Certifications | BSEN 1856-2, HETAS, CE, Building Regulations Document J |
| Sealant Recommendation | Fire cement, Ceramic rope, or High-temperature sealant |