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Sflue Black (2159805B) - Structural Locking Band - Ø 127 (42-125-054)

The Sflue Black Structural Locking Band Ø 127 from National Flues is a high-calibre accessory engineered to enhance the stability and safety of your chimney system. Designed for use with solid fuel, gas, and oil appliances, this product exemplifies robust construction and proven performance. Read more...
Sflue Black (2159805B) - Structural Locking Band - Ø 127
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Now only £63.99
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At a Glance

  • Designed for solid fuel, gas and oil appliances
  • Constructed with 304-grade and 316-grade stainless steel (0.40mm thick)
  • Incorporates compressed rockwool insulation (230kg/m³)
  • Features an innovative 8-barbed twist lock system
  • 50mm clearance requirement for safety; HETAS approved and CE marked

Please Note: All dimensions refer to the internal diameter of flues. If unsure, please call 01670 206999 to ensure you choose the correct products.

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

The Sflue Black (2159805B) - Structural Locking Band - Ø 127 is an essential component for ensuring the stability of your chimney system. Designed for use with solid fuel, gas, and oil appliances, it is compatible with wood stoves, gas coal-effect fires, oil and gas boilers, and any other solid fuel appliances. Constructed with an outer skin of 304-grade stainless steel and an inner skin of 316-grade stainless steel, both 0.4mm thick, this locking band offers exceptional durability and resilience.

The insulation consists of compressed rockwool with a density of 230kg/m3, encapsulated within twist-lock couplers, ensuring optimal heat retention and safety. Fully laser welded parts contribute to its robust construction. Designed with an 8-barbed twist lock and requiring a 50mm distance from combustible materials, the Sflue Black structural locking band is both HETAS approved and CE marked, with a designation number of EN1856-1 T450 N1 D V2 L50040 G50.

Its precise engineering ensures that your chimney stands secure, even when unsupported up to 2.5m above the final support or wall band.

SKU: 42-125-054

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
SKU42-125-054
Product NameSflue Black (2159805B) - Structural Locking Band - Ø 127
Chimney DiameterØ 127
Outer Material304-grade stainless steel (0.40mm thick)
Inner Material316-grade stainless steel (0.40mm thick)
InsulationCompressed rockwool (230kg/m³)
Locking System8-barbed twist lock
Distance To Combustibles50mm
Design StandardEN1856-1 T450 N1 D V2 L50040 G50
ApprovalsHETAS / CE
Warranty15 Years manufacturing defect warranty, 2 Years paint Warranty
• Before installation, verify that the flue dimensions and chimney configuration comply with the manufacturer's guidelines. • Ensure that there is a minimum distance of 50mm from any combustible material, such as wood or plasterboard. • The Sflue Black Structural Locking Band is installed using an 8-barbed twist lock system. Begin by aligning the components accurately; then, engage the twist-lock mechanism until firmly secured. • It is essential to check that all laser-welded joints remain intact and that the insulation is properly positioned within the twist-lock couplers. • If installing on an unsupported stack, confirm that the flue is positioned no more than 2.5m above the final support or wall band to maintain structural integrity. • For optimal results and safety, we recommend that installation be carried out by a qualified professional familiar with local building regulations.

It can be used with solid fuel, gas, and oil appliances such as woodstoves, gas coal-effect fires, and oil and gas boilers.

The outer skin is made from 304-grade stainless steel and the inner skin from 316-grade stainless steel, both 0.4mm thick.

Yes, the Sflue Black Structural Locking Band is HETAS approved and CE marked.

The compressed rockwool insulation, with a density of 230kg/m3, provides optimal heat retention and safety.

There should be a distance of 50mm from the outside of the flue to any combustible materials such as wood or plasterboard.

The designation number is EN1856-1 T450 N1 D V2 L50040 G50.

The Sflue locking band uses an 8-barbed twist lock system to secure the chimney parts together. Ensure to maintain a 50mm distance from combustible materials during installation.

 

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