Top Clamp - Ø 300 (20-300-C)
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Fast deliveryFriday, November 14th*
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Best PriceCall us to beat any price you found online.
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At a Glance
- High-quality 316L stainless steel construction
- Compatible with MI-FLEX 316 and 904 flexible flue liners
- Withstands temperatures up to 600°C (T600 designation)
- Complies with Building Regulations Document J
- Provides robust support to stabilise chimney linings
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: sales@nationalflues.com
- Details
- Specs
- Install/Packs
- FAQs
The Top Clamp - Ø 300 is a crucial component for ensuring the stability and effectiveness of your chimney system. Perfectly designed for use with MI-FLEX 316 and 904 flexible flue liners, this top clamp provides essential support by bearing the vertical weight of the flue liner at the top of the stack. All MI-FLEX accessories, including this top clamp, comply with Building Regulations Document J, which mandates that a flexible flue liner must be installed completely enclosed inside a masonry chimney.
The top clamp is suitable for appliances operating at temperatures up to 600°C (T600 designation), making it ideal for use with wood (under 20% moisture), smokeless coal, gas, and oil. For optimal functionality, ensure that the chimney stack is fully weatherproofed and of sound construction, and that all chimney pots are in good condition with appropriate flaunching. Regular maintenance and sweeping are essential for safe operation, particularly with solid fuel appliances.
Adhering to recommended cleaning schedules will help prevent blockages and ensure long-term efficiency.
SKU: 20-300-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.
This is us — real advice over the phone, or at the counter, and real stock in our warehouse.
| Technical Specifications | |
|---|---|
| SKU | 20-300-C |
| Product Name | Top Clamp - Ø 300 |
| Material | 316L Stainless Steel |
| Compatibility | MI-FLEX 316 and 904 flexible flue liners |
| Temperature Rating | Up to 600°C (T600) |
| Fuel Types | Wood (under 20% moisture), Smokeless coal, Gas, Oil |
| Compliance | HETAS / CE, Building Regulations Document J |
| Finish | Natural / Stainless Steel |
| System | MI-FLEX Accessories MF20 |