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Top Clamp - Ø 150 (20-150-C)

National Flues presents the Top Clamp Ø 150, a key accessory in the secure installation of flexible flue liners. Formulated to work seamlessly with MI-FLEX 316 and 904 flue liners, this product is a critical component in ensuring the safety and stability of your chimney system. Ideal for various fuel types, including wood, oil, gas, and smokeless coal, the Top Clamp Ø 150 is engineered for durability and high performance. Enhance your chimney setup with this essential, reliable support accessory and experience the quality and expertise of National Flues.
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£10.49
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At a Glance

  • Robust construction in 316L stainless steel
  • Designed for flexible flue liners (MI-FLEX 316 & 904)
  • Handles high temperatures up to 600°C (T600 rating)
  • Complies with HETAS, CE and Building Regulations (Doc J)
  • Compatible with wood (under 20% moisture), oil, gas, and smokeless coal
  • Essential support element for chimney stack installations

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.
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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.

Free Delivery Over £100: Orders over £100 are free delivery (call us if delivery is required outside the mainland UK).

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Have Questions?
Phone: 01670 206999
Email: [email protected]

The Top Clamp Ø 150 is a vital component in the installation of flexible flue liners. Specifically designed for use with MI-FLEX 316 and 904 flue liners, this top clamp ensures a secure and stable fit at the top of your chimney stack. It's perfect for multi-fuel applications, handling temperatures up to 600°C (T600 designation), and works seamlessly with wood (under 20% moisture), smokeless coal, gas, and oil appliances.

Compliance with Building Regulations Document J is essential, stipulating that flexible flue liners must be enclosed in a masonry chimney. Before installation, ensure your chimney stack's structure is sound, all chimney pots are crack-free, and proper flaunching is applied at the stack's top. Ensure your chimney system allows for easy sweeping and maintenance by professional sweeps, ideally twice a year for solid fuel applications.

SKU: 20-150-C

Technical Specifications
SKU20-150-C
Material316L Stainless Steel
Sizeu00d8 150
Temperature Rating600u00b0C (T600)
ComplianceHETAS / CE, Building Regs Doc J
SystemMI-FLEX Accessories MF20
Compatible FuelsWood (under 20% moisture), Oil, Gas, Smokeless Coal
ApprovalsHETAS / CE
- Use in conjunction with the Top Plate and Top Insert Sleeve for complete support. - Ensure your chimney stack is solid, with crack-free chimney pots. - Flaunching must be correctly applied at the top of the stack to enhance stability. - Installation should only be performed in a masonry chimney as required by Building Regulations Document J. - Regular maintenance and sweeping (at least twice a year for solid fuel appliances) are recommended to keep your system safe and efficient.

The Top Clamp Ø 150 is used to support the vertical weight of a flue liner within a chimney stack, ensuring stability and safety.

Yes, it is suitable for use with appliances that reach up to 600°C (T600 designation).

The Top Clamp Ø 150 is compatible with wood (with less than 20% moisture), smokeless coal, gas, and oil.

Yes, it complies with Building Regulations Document J, requiring flexible flue liners to be installed within a masonry chimney.

You will need a Top Plate and a Top Insert Sleeve to correctly support the weight of the flue liner at the chimney stack's top.

For solid fuel applications, it's recommended to sweep the chimney at least twice a year: once at the end of the heating season and once at the start of the next season.

Ensure the chimney system allows for easy sweeping and maintenance. Avoid using chemical cleaners or mild steel tools on stainless steel chimneys.
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 Top Clamp - Ø 150 buyers guide

Elevate your chimney safety with the Top Clamp Ø 150 – add it to your cart now for unmatched performance!

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