Sflue Black (2141205B) - Adjustable Pipe 350-530mm - Ø 127
At a Glance
- Adjustable length from 350mm to 530mm for flexible installations
- Constructed with durable 316L and 304 grade stainless steel
- Compressed rockwool insulation (230kg/m³) improves thermal efficiency
- HETAS approved and CE marked for safety
- Secure 8 barbed twist lock system with Locking Band ensures a stable fit
- Suitable for woodstoves, gas fires, boilers, and other appliances

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 Adjustable Pipe 350-530mm is a versatile and high-quality component designed for solid fuel and gas/oil appliances, including woodstoves, gas fires, and boilers. This telescopic adjustable length allows for flexibility where standard dimensions fall short. The outer skin is constructed from 304 grade stainless steel at a thickness of 0.4mm, while the inner skin boasts 316 grade stainless steel at the same thickness.
Compressed rockwool insulation with a density of 230kg/m³ ensures optimal thermal protection, encapsulated within twist-lock couplers. Engineered with precision, all parts are fully laser welded. The distance to combustibles is 50mm, guaranteeing safety.
Sflue is HETAS approved and CE marked with designation number EN1856-1 T450 N1 D V2 L50040 G50. Installation is straightforward using the 8 barbed twist lock system and Locking Band, ensuring each component fits securely. Adhering to a 50mm clearance from any combustible material is crucial for safe operation.
SKU: 42-125-015
Technical Specifications | |
---|---|
SKU | 42-125-015 |
Adjustable Length | 350-530mm |
Outer Diameter | u00d8 127mm |
Outer Material | 304 Stainless Steel (0.40mm thick) |
Inner Material | 316L Stainless Steel (0.40mm thick) |
Insulation | Compressed Rockwool (230kg/mu00b3) |
Approvals | HETAS / CE |
Designation | EN1856-1 T450 N1 D V2 L50040 G50 |
Warranty | 15 Years manufacturing defect warranty; 2 Years paint warranty |
Clearance | 50mm from combustibles |
Connection | 8 barbed twist lock system with Locking Band |
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 Adjustable Chimney Pipe is a top-notch choice for any heating appliance setup, featuring exceptional durability and performance. Enjoy our reliable nationwide delivery and competitive pricing, whether you're a retail or trade customer.
The Sflue Black Adjustable Pipe is designed to connect and extend chimneys for solid fuel and gas/oil appliances, ensuring safe and efficient ventilation.
National Flues is a leading supplier of fireplaces and flues across the UK, committed to providing high-quality products at competitive prices, with reliable nationwide delivery for both retail and trade customers.
