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Top Clamp - Ø 180 (20-180-C)

The Top Clamp - Ø 180 by National Flues is a premium chimney accessory specifically engineered for the secure installation of MI-FLEX 316 and 904 flexible flue liners. This robust component combines high-quality 316L stainless steel construction with industry-approved safety features such as HETAS and CE compliance. Read more...
Top Clamp - Ø 180
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At a Glance

  • Designed specifically for MI-FLEX 316 and 904 flexible flue liners
  • Provides secure, reliable support for the vertical weight of the flue liner
  • Manufactured in premium 316L stainless steel for durability and corrosion resistance
  • Fully compliant with HETAS and CE regulations
  • Compatible with multiple fuel types including wood (with less than 20% moisture), oil, gas, and smokeless coal

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Price Match Guarantee: If you find the same product cheaper within 48 hours, we’ll match it and refund the difference.

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Have Questions?
Phone: 01670 206999
Email: sales@nationalflues.com

The Top Clamp - Ø 180 is a crucial accessory designed specifically for use with MI-FLEX 316 and 904 flexible flue liners. This top-tier component is part of the MF20 MI-FLEX accessories family, engineered to ensure a complete and secure chimney system. The Top Clamp offers exceptional support for the vertical weight of the flue liner, ensuring stability and safety.

Conforming to Building Regulations Document J, this product is suitable for use with a range of appliances up to 600°C, including wood-burning stoves with less than 20% moisture, smokeless coal, gas, and oil. Proper installation requires the chimney structure to be sound and weatherproof, with all chimney pots crack-free and the appropriate flaunching made at the top of the stack. Additionally, it works in conjunction with the Top Plate and Top Insert Sleeve for maximal support.

Maintenance is straightforward, as the system allows for easy sweeping and inspection, ensuring long-term reliability and performance.

SKU: 20-180-C

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.

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Technical Specifications
SKU20-180-C
DimensionsØ 180
Material316L Stainless Steel
Colour FinishNatural / Stainless Steel
System CompatibilityMI-FLEX Accessories MF20, suitable for 316 and 904 flexible liners
ApprovalsHETAS, CE
Fuel CompatibilityWood (less than 20% moisture), Oil, Gas, Smokeless Coal
Temperature RatingUp to 600°C
Installation RequirementsRequires a fully enclosed masonry chimney with sound, weatherproof structure and crack-free chimney pots.
For a safe and compliant installation, ensure that the chimney structure is robust and weatherproof. The chimney pots must be in excellent condition, without any cracks, and have been fitted with the appropriate flaunching at the top of the stack. The Top Clamp - Ø 180 is designed to work in conjunction with the Top Plate and Top Insert Sleeve. Before installation, double-check that all components of your MI-FLEX flue system are present and correctly aligned. It is also essential to verify that the chimney is fully enclosed in a masonry structure, as non-masonry enclosures such as timber or plasterboard are not acceptable. Finally, installation and maintenance should be carried out by a competent professional to ensure that all safety and regulatory requirements are met.

The Top Clamp - Ø 180 is used to support the vertical weight of MI-FLEX 316 and 904 flexible flue liners, ensuring a secure and stable chimney system.

Yes, it is suitable for appliances that burn wood with less than 20% moisture, smokeless coal, gas, and oil, handling temperatures up to 600°C.

The chimney stack must be weatherproof, structurally sound, with intact chimney pots and proper flaunching. It should also be fully enclosed in a masonry chimney as per Building Regulations Document J.

The Top Clamp works alongside the Top Plate and Top Insert Sleeve to provide comprehensive support and stability to the flue liner at the top of the chimney stack.

Regular inspections and maintenance are recommended at least once a year. For solid fuel applications, sweeping is recommended at the end and start of each heating season to remove any deposits and ensure there are no blockages.

Yes, sweeping must be performed by a competent person, preferably a HETAS registered sweep. Avoid using chemical cleaners or mild steel tools on the stainless steel chimney system.

No, the Top Clamp - Ø 180 can only be used within a fully enclosed masonry chimney. Timber or plasterboard enclosures are not acceptable as per building regulations.

 

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