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MI-FLEX Adaptor 1mm - Ø 150

National Flues proudly presents the MI-FLEX Adaptor 1mm - Ø 150, a premium chimney flue adaptor designed to flawlessly connect your rigid flue systems to MI-FLEX flexible liners. This high-quality stainless steel component is compatible with wood, oil, gas, and smokeless coal, making it an essential... More...
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At a Glance

  • Made from durable 316L stainless steel with a natural finish
  • Seamlessly connects rigid flue systems to MI-FLEX flexible liners
  • Suitable for wood (under 20% moisture), oil, gas and smokeless coal
  • Withstands temperatures up to 600°C (T600) for reliable performance
  • Compliant with Building Regulations Document J
  • Provides a gas-tight connection when used with proper sealants
  • Part of the comprehensive MF20 MI-FLEX accessory range
Now only £32.49
Including VAT Buy with confidence. If you find this cheaper within 48 hours of checkout, we'll refund the difference.

 

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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:

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Have Questions?
Phone: 01670 206999
Email: [email protected]

The MI-FLEX Adaptor 1mm - Ø 150 is designed to provide a seamless connection between a single wall rigid flue system and a MI-FLEX 316 or 904 flexible flue liner with the same nominal diameter. This adaptor is part of our MF20 MI-FLEX accessory range, ensuring a comprehensive chimney system when used in conjunction with MI-FLEX liners. Perfect for multiple fuel types, including wood with less than 20% moisture, smokeless coal, gas, and oil, it handles temperatures up to 600°C.

Compliance with Building Regulations Document J is crucial, as it's essential that flexible flue liners are completely enclosed within a masonry chimney. Any exposed flex must be avoided and connections should be gas-tight, using fire cement, ceramic rope, tape, or high-temperature sealant. Regular maintenance, including sweeping by a competent person, ensures optimal performance and longevity of your chimney system.

SKU: 20-150-MAE1

Technical Specifications
Adaptor Diameteru00d8 150
Wall Thickness1mm
Material316L Stainless Steel
Temperature RatingUp to 600u00b0C (T600)
Fuel CompatibilityWood (<20% moisture), Oil, Gas, Smokeless Coal
ApprovalsHETAS / CE
System RangeMI-FLEX Accessories MF20
FinishNatural / Stainless Steel
Installation Instructions & Warnings: • Ensure the adaptor is fitted by a competent professional to maintain the integrity of your chimney system. • The adaptor is designed to connect a rigid flue system to a MI-FLEX flexible liner; verify that both components have matching nominal diameters. • It is essential to completely enclose the flexible flue liner within a masonry chimney as per Building Regulations Document J. Exposed flex or non-masonry enclosures (e.g. timber or plasterboard boxing) are not acceptable. • Achieve a gas-tight seal by applying fire cement, ceramic rope, tape, or a high-temperature sealant at the connection points. • Regular maintenance, including sweeping and inspection by a qualified chimney sweep (especially for solid fuel applications), is recommended to ensure longevity and safe operation. • Before installation, review all manufacturer instructions and local regulations to ensure compliance.

The MI-FLEX Adaptor is suitable for wood with less than 20% moisture, smokeless coal, gas, and oil.

Yes, it complies with Building Regulations Document J, which requires flexible flue liners to be completely enclosed within a masonry chimney.

The MI-FLEX Adaptor can handle temperatures up to 600°C (T600 designation).

Regular sweeping and inspection should be carried out by a competent person at least once a year, and twice a year for solid fuel appliances.

Use fire cement, ceramic rope or tape, or high-temperature sealant to secure the bottom fixing into the connecting flue and flexible liner.

No, flexible flue liners must be enclosed within a masonry chimney. Non-masonry enclosures like timber or plasterboard boxing are not acceptable.

For solid fuel applications, you can find a list of HETAS registered sweeps at www.hetas.co.uk.
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Thursday, April 3rd. 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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Read our buyers guide for this MI-FLEX Adaptor 1mm - Ø 150

National Flues Ltd Verdict

The MI-FLEX Adaptor 1mm - Ø 150 is a vital component for a reliable chimney system. At National Flues, we’re rarely beaten on price and ensure dependable nationwide delivery. Perfect for both retail and trade customers.

The MI-FLEX Adaptor is designed to connect a rigid single wall flue system to a MI-FLEX flexible flue liner of the same nominal diameter, ensuring a gas-tight, secure chimney system.

National Flues is a leading supplier of fireplaces and flues across the UK, known for competitive pricing, reliable delivery, and comprehensive support for both retail and trade customers.

 

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Upgrade your chimney system now and enjoy unparalleled performance—buy with confidence at National Flues!

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