Adjustable Pipe 350-500mm Ø 125
At a Glance
- Adjustable Range: 350-500mm for flexible installation
- Durable Construction: 304 grade stainless steel outer and 316 grade inner, both 0.4mm thick
- High Thermal Efficiency: Insulated with high-density compressed rockwool (200kg/m³)
- Certified Safety: HETAS Approved and CE marked meeting EN1856-1 standards
- Easy Installation: Secure locking band mechanism for a screw-free setup
- Versatile Use: Suitable for woodstoves, gas coal effect fires, oil and gas boilers
- Safe Clearance: Maintains a 50mm distance 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: sales@nationalflues.com
- Info
- Specs
- Install
- FAQs
The Adjustable Pipe 350-500mm Ø 125 is designed for use on solid fuel and gas/oil appliances, such as woodstoves, gas coal effect fires, and oil and gas boilers. The outer skin is crafted from durable 304 grade stainless steel with a thickness of 0.4mm, while the inner skin uses 316 grade stainless steel at the same thickness. The pipe is insulated with high-density compressed rockwool at 200kg/m³, ensuring excellent thermal performance and safety.
This product meets all necessary safety standards and is both HETAS Approved and CE marked, bearing designation numbers EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 W V2 L50040 O20. Installation is straightforward with the use of a Locking Band, and the pipe maintains a safe distance of 50mm from any combustible materials.
SKU: 2-125-015
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, April 8th. 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
At National Flues, we highly recommend the Adjustable Pipe 350-500mm Ø 125 for its versatility and top-notch construction. Suitable for both retail and trade customers, and offered at competitive prices with reliable nationwide delivery.
The Adjustable Pipe 350-500mm Ø 125 is used for efficient and safe venting of gases from solid fuel and gas/oil appliances, providing a reliable flue solution.
National Flues is a leading supplier of fireplaces and flues in the UK, known for unbeatable prices, reliable delivery, and excellent service for both retail and trade customers.
