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Top Clamp - Ø 80 (20-80-C)

The MI-FLEX Top Clamp - Ø 80 is expertly engineered from durable 316L stainless steel to secure your flexible flue liner in style and safety. Ideal for wood, oil, gas, and smokeless coal applications, this essential accessory for any masonry chimney installation aligns with the highest building regulations. Read more...
Top Clamp - Ø 80
IN STOCK
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At a Glance

  • Constructed from robust 316L stainless steel
  • Withstands temperatures up to 600°C
  • Specifically designed for masonry chimneys
  • Compliant with Building Regulations Document J and HETAS/CE standards
  • Versatile compatibility with wood (<20% moisture), oil, gas, and smokeless coal

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

The Top Clamp - Ø 80 is a crucial accessory for the secure installation of MI-FLEX 316L and 904 flexible flue liners, forming a comprehensive chimney system. Designed for use with your multi-fuel flue liner, this clamp supports up to 600°C (T600) and is suitable for wood with less than 20% moisture, smokeless coal, gas, and oil. As per Building Regulations Document J, this clamp must be used within a masonry chimney.

The chimney stack should be prepped to be fully weatherproofed and in good condition before installation. This reliable top fixing ensures the vertical stability of your flue liner, working in tandem with the Top Plate and Top Insert Sleeve to support the liner at the top of the chimney stack. Regular maintenance is essential for longevity and efficiency, and chimneys serving solid fuel appliances should be swept at least twice annually by a HETAS registered sweep.

SKU: 20-80-C

Delivery Information* +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Friday, November 14th. 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
SKU20-80-C
Material316L Stainless Steel
Temperature Rating600°C
Compatible FuelsWood (<20% moisture), Oil, Gas, Smokeless Coal
Chimney TypeMasonry
ComplianceHETAS/CE, Building Regulations Document J
SystemMI-FLEX Accessories MF20
Before installation, ensure that your masonry chimney is fully weatherproofed, structurally sound, and has all chimney pots in good condition. The Top Clamp must be installed in conjunction with the Top Plate and Top Insert Sleeve to secure the flue liner effectively. Strictly adhere to Building Regulations Document J by only using this clamp within a masonry chimney environment. Regular maintenance is critical: chimneys serving solid fuel appliances should be swept at least twice a year by a HETAS registered professional. Always consult the complete installation guidelines provided by the manufacturer and, if in doubt, seek expert assistance to maintain the longevity and efficiency of your chimney system.

The Top Clamp - Ø 80 is used to support the vertical weight of MI-FLEX flexible flue liners in chimney installations.

Yes, the Top Clamp - Ø 80 complies with Building Regulations Document J, requiring it to be installed within a masonry chimney.

The clamp is suitable for wood with less than 20% moisture, smokeless coal, gas, and oil, enduring temperatures up to 600°C.

No, the clamp must strictly be used within a masonry chimney. A non-masonry enclosure like timber or plasterboard is not acceptable.

Ensure the chimney stack is fully weatherproofed, structurally sound, with all chimney pots in good condition and appropriate flaunching completed.

The chimney system should be cleaned and inspected at least once a year, but chimneys serving solid fuel appliances should be swept twice annually.

Sweeping should be performed by a competent person. For solid fuel applications, it is recommended to use a HETAS registered sweep.

 

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