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Increasing MI-FLEX Adaptor - Ø 180-Ø 200 (20-180-MR)

National Flues presents the Increasing MI-FLEX Adaptor Ø 180-Ø 200, an essential accessory for achieving a seamless connection between single wall flue systems and MI-FLEX flexible flue liners. This high-quality adaptor, engineered in durable 316L stainless steel and designed for multi-fuel compatibility, ensures both robust performance and compliance with stringent safety standards such as HETAS and CE. Discover unparalleled efficiency and reliability with this indispensable flue accessory, perfectly suited for both domestic and trade installations.
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£33.99
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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

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Phone: 01670 206999
Email: [email protected]

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
Material316L Stainless Steel
Thickness0.6mm
Diameter Transitionu00d8 180mm to u00d8 200mm
Temperature RatingUp to 600u00b0C (T600)
ComplianceBSEN 1856-2 T600 N1 W V2 L50012 G, HETAS / CE
Suitable FuelsWood (<20% moisture), Oil, Gas, Smokeless Coal
ApplicationConnecting rigid single wall flue systems to MI-FLEX flexible flue liners
Ensure that the adaptor is installed strictly according to the manufacturer’s guidelines. It is critical that the adaptor is fully contained within a masonry chimney as required by Building Regulations Document J. Use appropriate high-temperature sealants such as fire cement, ceramic rope, or tape to achieve a gas-tight seal. The installation should always be performed by a HETAS registered professional or a competent person who can guarantee safe and effective integration into the overall chimney system. Remember to leave adequate clearance for regular chimney sweeping and maintenance to ensure peak performance.

The MI-FLEX Adaptor Ø 180-Ø 200 is manufactured from 0.6mm 316 stainless steel, making it highly durable and resistant to high temperatures.

Yes, the adaptor is suitable for use with wood (less than 20% moisture), smokeless coal, gas, and oil, handling temperatures up to 600°C.

Installation must comply with Building Regulations Document J. Flexible flue liners must be enclosed within a masonry chimney, and no flue component should be visible outside.

Regular sweeping ensures the chimney remains free from deposits and blockages, enhancing its efficiency and safety. It’s recommended to sweep at least twice a year, especially for solid fuel applications.

Only non-chemical cleaners and non-mild steel tools should be used to clean the stainless steel chimneys. A competent person or a registered chimney sweep should perform the maintenance.

The adaptor acts as a transitional joint, increasing the diameter by 20mm from the single wall to the flexible flue liner, ensuring a smooth and gas-tight connection.

Materials like fire cement, ceramic rope or tape, or high-temperature sealant are recommended to ensure a gas-tight seal at the connection points.
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Wednesday, April 30th. 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 on a retail basis. Give us a call if you find it cheaper and want to buy from us.

Read our review in our Increasing MI-FLEX Adaptor - Ø 180-Ø 200 buyers guide

Secure a flawless transition in your flue system today by choosing the Increasing MI-FLEX Adaptor – an ideal solution for robust, safe, and efficient chimney performance.

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