Increasing MI-FLEX Adaptor - Ø 180-Ø 200
At a Glance
- - Constructed from high-quality 0.6mm 316 stainless steel
- - Seamlessly connects rigid single wall flue systems to MI-FLEX flexible flue liners
- - Increases flue diameter from Ø 180mm to Ø 200mm for a secure, gas-tight fit
- - Suitable for multi-fuel applications including wood, oil, gas and smokeless coal
- - Complies with Building Regulations Document J and HETAS / CE standards

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]
- Info
- Specs
- Install
- FAQs
The Increasing MI-FLEX Adaptor Ø 180-Ø 200 is an essential component for creating a seamless flue system. Constructed from high-quality 0.6mm 316 stainless steel, this adaptor ensures durability and reliability. It is specifically designed to serve as a transitional joint, connecting rigid single wall flue systems to MI-FLEX 316 and 904 flexible flue liners.
These flexible flue liners are suitable for multi-fuel applications, including wood with less than 20% moisture, smokeless coal, gas, and oil, operating at temperatures up to 600°C (T600 designation). Meeting Building Regulations Document J, this adaptor must be fully enclosed within a masonry chimney for safe and efficient operation. The adapter effectively increases the diameter by 20mm, aiding in the smooth transition from one diameter to another, ensuring a gas-tight seal when used with appropriate materials like fire cement or high-temperature sealant.
It's crucial for the adaptor to be easily accessible for chimney sweeping and maintenance by a competent person, such as a HETAS registered professional. Proper cleaning and inspection ensure the longevity and functionality of the entire chimney system, with recommendations to perform these tasks at least twice a year for solid fuel applications.
SKU: 20-180-MR
Technical Specifications | |
---|---|
Material | 316L Stainless Steel |
Thickness | 0.6mm |
Diameter Transition | u00d8 180mm to u00d8 200mm |
Temperature Rating | Up to 600u00b0C (T600) |
Compliance | BSEN 1856-2 T600 N1 W V2 L50012 G, HETAS / CE |
Suitable Fuels | Wood (<20% moisture), Oil, Gas, Smokeless Coal |
Application | Connecting rigid single wall flue systems to MI-FLEX flexible flue liners |
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.
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National Flues Ltd Verdict
This Increasing MI-FLEX Adaptor Ø 180-Ø 200 is a top-tier product for any flue system installation. Backed by our unbeatable prices and reliable nationwide delivery, it’s perfect for both retail and trade customers.
The Increasing MI-FLEX Adaptor Ø 180-Ø 200 is designed to connect rigid single wall flue systems seamlessly to flexible flue liners, enhancing the overall efficiency and safety of chimney systems.
National Flues is a leading supplier of high-quality fireplaces and flues, offering both retail and trade customers exceptional products at competitive prices, supported by reliable nationwide delivery services.
