Testing Length 500mm Ø 150
At a Glance
- - Designed for solid fuel, gas, and oil appliances
- - Premium 304 and 316 stainless steel construction
- - 0.4mm wall thickness for exceptional durability
- - Compressed rockwool insulation at 200kg/m³ for optimal heat retention
- - HETAS Approved and CE Marked for guaranteed safety
- - Ensures 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: sales@nationalflues.com
- Info
- Specs
- Install
- FAQs
The Testing Length 500mm Ø 150mm chimney flue pipe is designed for solid fuel and gas/oil appliances such as wood stoves, gas coal effect fires, oil, and gas boilers. Its robust construction features an outer skin made from 304-grade stainless steel and an inner skin from 316-grade stainless steel, both 0.4mm thick. It’s packed with compressed rockwool insulation at a density of 200kg/m3.
This well-engineered pipe ensures a safe distance of 50mm from combustibles. TWPro's design qualifications include HETAS Approved and CE marking, with designation numbers EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 W V2 L50040 O20. For a secure setup, use a Locking Band to join the TWPro Twin Wall Insulated Chimney parts, ensuring the mandatory 50mm clearance from flammable materials.
SKU: 2-150-019
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Monday, April 7th. 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 rarely beaten on price and pride ourselves in delivering reliable and high-quality products. Our Testing Length 500mm Ø 150mm chimney flue pipe is a standout choice for both retail and trade customers. Secure online payments and nationwide delivery ensure your purchase experience is seamless. Our verdict: top-notch safety, construction, and approval standards at unbeatable prices.
The Testing Length 500mm Ø 150mm chimney flue pipe is used for safe and efficient venting of solid fuel, gas, and oil appliances, ensuring proper draft and flue performance.
National Flues is a trusted supplier of fireplaces and flues across the UK, known for unbeatable prices, reliable delivery, and top-quality products. Serving both retail and trade customers nationwide, we provide secure online payments and exceptional customer service.
