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Sflue (2159805) - Structural Locking Band - 127mm Ø (22-125-054)

Discover National Flues' Sflue Structural Locking Band – 127mm Ø, an essential accessory for secure chimney installations. Ideal for wood, oil, and gas appliances, this product guarantees safety and performance thanks to its robust stainless steel construction and compliance with HETAS and CE standards. Enhance your flue system with this high-quality locking band and consider exploring our range of optional chimney accessories to perfectly complement your setup.
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£49.49
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At a Glance

  • Robust dual stainless steel construction (304 outer, 316 inner) for durability
  • 0.40mm thick materials ensuring strength and reliability
  • 8-barbed twist lock mechanism for secure, hassle-free installation
  • Compressed rockwool insulation (230kg/m3) for enhanced thermal resistance
  • HETAS approved and CE marked for safety compliance
  • Maintains a safe 50mm gap from combustibles
  • Designed for unsupported stacks up to 2.5m above support
  • Backed by a 15-year warranty for long-term peace of mind

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.
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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.

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

The Sflue (2159805) Structural Locking Band - 127mm Ø offers exceptional security for chimney flues, particularly for unsupported stacks extending up to 2.5m above the final support or wall band. Constructed with a dual skin of premium-grade stainless steel—304 on the outer and 316 on the inner—this locking band ensures maximum durability and resistance to corrosion. The 0.4mm thick stainless steel and compressed rockwool insulation (230kg/m3) effectively contain heat, reducing the risk of hazards.

Each part of the Sflue system is laser-welded for flawless performance and adheres to rigorous standards, including HETAS approval and CE marking. With an 8-barbed twist lock mechanism, the Sflue Structural Locking Band promises seamless installation while maintaining a safe 50mm distance from combustibles.

SKU: 22-125-054

Technical Specifications
SKU22-125-054
Product NameSflue (2159805) - Structural Locking Band - 127mm u00d8
MaterialsOuter: 304 Stainless Steel, Inner: 316 Stainless Steel
Thickness0.40mm per layer
InsulationCompressed Rockwool (230kg/m3)
Clearance To Combustibles50mm
ApprovalsHETAS / CE
Lock Mechanism8-barbed twist lock
Warranty15 Years
Installation is made straightforward by the innovative 8-barbed twist lock mechanism. Key points to remember include: - Ensure unsupported stacks do not exceed 2.5m above the final support or wall band. - Maintain a minimum clearance of 50mm from any combustible material. - Follow the laser-welded joint indications for a seamless fit. - Although designed for DIY installation, consulting a professional installer is recommended to comply with UK building and safety regulations.

The Sflue Structural Locking Band is suitable for solid fuel, gas, and oil appliances, including woodstoves, gas coal effect fires, oil and gas boilers, and any other solid fuel appliances.

The outer skin is made from 304 grade stainless steel, and the inner skin is made from 316 grade stainless steel. Both layers are 0.4mm thick, with insulation made from compressed rockwool (230kg/m3).

Yes, the Sflue Structural Locking Band is HETAS approved and CE marked, ensuring it meets high safety and quality standards.

The distance to any combustible material, such as wood or plasterboard, must be at least 50mm from the outer side of the flue.

Sflue components use an 8-barbed twist lock system that securely fastens together with a locking band for a tight, reliable fit.

Compressed rockwool insulation provides high thermal resistance, effectively contains heat within the flue, and reduces the risk of fire hazards by maintaining a safe external temperature.

While the Sflue Structural Locking Band is designed for easy installation with its twist lock mechanism, it's recommended to have a professional installer to ensure compliance with safety regulations.
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 Sflue (2159805) - Structural Locking Band - 127mm Ø buyers guide

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Secure your chimney’s performance now with the Sflue Structural Locking Band – an investment in lasting safety.

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