Sflue Black (2141805B) - Inspection Length - Ø 127
At a Glance
- Dual stainless steel construction: 304 exterior and 316L interior at 0.40mm thickness
- Robust compressed rockwool insulation (230kg/m3) for enhanced thermal performance
- Secure 8-barbed twist-lock mechanism for an easy and reliable installation
- HETAS approved and CE marked to meet strict safety standards
- Integrated removable door for hassle-free inspection and cleaning
- Versatile compatibility with woodstoves, gas coal effect fires, oil, and gas boilers
- Maintains a safe 50mm clearance from combustible materials

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]
- Info
- Specs
- Install
- FAQs
The Sflue Black (2141805B) Inspection Length Ø 127mm is meticulously designed for use with solid fuel and gas/oil appliances, including woodstoves, gas coal effect fires, and oil and gas boilers. Constructed with a 0.4mm thick outer skin of 304-grade stainless steel and an inner skin of 316-grade stainless steel, this product ensures superior durability and performance. The unit features compressed rockwool insulation with a density of 230kg/m3, encapsulated within twist-lock couplers, and secured by an 8-barbed twist-lock mechanism for easy and secure installation.
The product is fully laser welded and maintains a required 50mm distance to combustible materials. HETAS approved and CE marked, the Sflue Black provides peace of mind with its safety and quality standards.
SKU: 42-125-019
Technical Specifications | |
---|---|
SKU | 42-125-019 |
Product Name | Sflue Black (2141805B) Inspection Length - u00d8 127 |
Outer Material | 304 Stainless Steel, 0.40mm thick |
Inner Material | 316L Stainless Steel, 0.40mm thick |
Insulation | Compressed Rockwool, 230kg/m3 |
Lock Mechanism | 8-barbed twist-lock coupler |
Approval | HETAS, CE Marked |
Minimum Clearance | 50mm to combustibles |
Applications | Woodstoves, Gas Coal Effect Fires, Oil and Gas Appliances |
Warranty | 15 years manufacturing defect warranty, 2 years paint warranty |
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Friday, April 4th. 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. If you find it cheaper within 48 hours, we'll refund the difference.
Compatible and other products that may be of interest...
National Flues Ltd Verdict
The Sflue Black 500mm Inspection Length Ø 127 is a top-tier choice for your chimney system, offering robust construction and reliable performance. National Flues delivers this top-value product nationwide, serving both retail and trade customers with unparalleled reliability.
The Sflue Black (2141805B) Inspection Length Ø 127mm is designed to provide a secure and efficient chimney system for solid fuel and gas/oil appliances.
National Flues is a trusted supplier of high-quality fireplaces and flues across the UK. Known for our competitive pricing, reliable delivery, and excellent customer service, we cater to both retail and trade customers nationwide.
