Top Clamp - Ø 80
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

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 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
Technical Specifications | |
---|---|
SKU | 20-80-C |
Material | 316L Stainless Steel |
Temperature Rating | 600u00b0C |
Compatible Fuels | Wood (<20% moisture), Oil, Gas, Smokeless Coal |
Chimney Type | Masonry |
Compliance | HETAS/CE, Building Regulations Document J |
System | MI-FLEX Accessories MF20 |
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.
National Flues Ltd Verdict
The Top Clamp - Ø 80 is an indispensable component for supporting MI-FLEX flue liners. Its robust design and compliance with Building Regulations make it highly reliable. National Flues rarely beat on price, delivering nationwide to both retail and trade customers.
The Top Clamp - Ø 80 is used to securely support the vertical weight of MI-FLEX flexible flue liners at the top of the chimney stack.
National Flues is a reputable supplier of fireplaces and flues, known for competitive pricing, reliable delivery, and serving both retail and trade customers nationwide.
