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Sflue Black (2117305B) - Cone Top - Ø 127 (42-125-093)

National Flues presents the Sflue Black Cone Top Ø 127, a premium twin-wall insulated chimney flue designed for optimal efficiency. This high-quality cone top chimney is engineered from 304 and 316 grade stainless steel, offering durability and safety for solid fuel, woodstove, gas, and oil applications. With its outstanding HETAS approval and CE marking, the Sflue Black Cone Top is the ideal choice for those who demand top performance and reliability in a chimney system.
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£74.49
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At a Glance

  • Dual-layer construction: 304 grade stainless steel outer skin and 316 grade stainless steel inner skin (both 0.4mm thick).
  • Superior insulation: High-density compressed rockwool (230kg/m3) for enhanced thermal efficiency.
  • Safety assured: 50mm clearance from combustibles and full compliance with EN1856-1 standards.
  • Easy installation: Integrated Twist Lock couplers with a secure Locking Band design.
  • Versatile applications: Suitable for solid fuel, woodstoves, gas coal effect fires, oil, and gas boilers.

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: [email protected]

The Sflue Black Cone Top Ø 127 is an exemplary product designed for use with solid fuel and gas/oil appliances, such as woodstoves, gas coal effect fires, as well as oil and gas boilers. Its construction features a dual-layered design with an outer skin made from 304 grade stainless steel and an inner skin composed of 316 grade stainless steel. Both skins are 0.4mm thick, providing unparalleled durability.

The insulation between these layers is high-density compressed rockwool (230kg/m3), encapsulated within twist-lock couplers for exceptional insulation and safety. Notably, the Sflue system maintains a safe distance of 50mm from any combustible materials. Fully laser welded and meeting EN1856-1 T450 N1 D V2 L50040 G50 standards, the Sflue Black is both HETAS Approved and CE marked, ensuring the highest quality.

This cone top design minimizes flue gas resistance, ideal for efficient performance. All parts are secured using a Locking Band, simplifying installation.

SKU: 42-125-093

Technical Specifications
SKU42-125-093
Product NameSflue Black (2117305B) - Cone Top u00d8 127
Outer Material304 Stainless Steel (0.40mm thick)
Inner Material316 Stainless Steel (0.40mm thick)
InsulationHigh-density compressed rockwool (230kg/m3)
ApprovalsHETAS, CE
Installation MethodTwist Lock couplers with a Locking Band
Clearance Requirement50mm from combustibles
Warranty15 Years manufacturing defect; 2 Years paint warranty
Before installation, ensure that a clearance of at least 50mm is maintained from any combustible materials. Start by aligning the twist-lock couplers on each insulated section of the chimney system. Secure each connection with the provided Locking Band to ensure a tight, leak-proof fit. Follow the detailed EN1856-1 guidelines during assembly. Always check that all safety standards are met and that the chimney is correctly supported to avoid undue stress on the connections. It is recommended that qualified professionals carry out the installation to comply with local building regulations and safety requirements.

It is suitable for solid fuel and gas/oil appliances, including woodstoves, gas coal effect fires, oil, and gas boilers.

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

Yes, the Sflue Black Cone Top Ø 127 is HETAS Approved and CE marked, affirming its safety and quality.

It uses high-density compressed rockwool with a density of 230kg/m3, encapsulated within twist-lock couplers.

It utilizes an 8-barbed twist lock system with Twin Wall Insulated Chimney parts secured together by a Locking Band. Ensure a 50mm clearance from combustibles.

The system requires a 50mm distance from the exterior of the flue to any combustible material (wood, plasterboard).

Yes, the twist-lock design and included Locking Band make the installation straightforward for professionals.
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 Black (2117305B) - Cone Top - Ø 127 buyers guide

Secure your Sflue Black Cone Top Ø 127 today for unmatched performance and safety.

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