× National Flues
We Won't Be Beaten On Price.
Free Delivery on Orders Over £100
100% 5 Star Reviews on Trustpilot
Free Flue Design Service Available
Need Help? 01670 206999 (8am-5pm)

Testing Length 500mm Ø 175 (2-175-019)

The TWPro Chimney Flue, Testing Length 500mm Ø 175, is engineered for excellence with superior twin wall insulation, making it the ideal choice for solid fuel, gas, and oil appliance systems. Combining durability with reliable performance, this flue provides a safe and efficient solution for your chimney needs while delivering the benefits of high-quality stainless steel construction and a user-friendly design.
Hover to Zoom / Click for Gallery
£94.99
Give us a call if you find it cheaper and we'll try to price match.

 

Payment Options

At a Glance

  • 500mm testing length for optimal system performance
  • Suitable for solid fuel, gas, and oil appliances
  • Dual stainless steel construction (304 outer, 316L inner) for durability
  • Twin wall insulated design ensures thermal efficiency
  • Built-in test point and cap for easy gas and draft sample collection
  • HETAS approved and CE marked for superior safety

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 500mm Testing Length Ø175 TWPro Twin Wall Insulated Chimney Flue is designed for solid fuel, gas, and oil appliances, such as woodstoves, gas-coal effect fires, and boilers. Featuring a test point and cap for easy gas and draft sample collection, this flue ensures safe operation and maintenance.Built with high-quality materials, the outer skin is crafted from 304-grade stainless steel (0.4mm thick), while the inner skin uses 316-grade stainless steel (0.4mm thick). Insulated with compressed rockwool at a density of 200kg/m³, the flue maintains optimal temperature and safety standards.

All components are fully welded for durability, and the flue requires a 50mm clearance from any combustible materials like wood or plasterboard.TWPro is HETAS approved and CE marked, meeting the highest safety and quality standards. Easy to install, the components secure together with a locking band, providing a reliable fit for any chimney system.

SKU: 2-175-019

Technical Specifications
Testing Length500mm
Internal Diameter175mm
Outer Material304 Stainless Steel (0.40mm thick)
Inner Material316L Stainless Steel (0.40mm thick)
InsulationCompressed Rockwool, 200kg/mu00b3
Appliance CompatibilityWood, Oil, Gas, Low sulphur coal
ApprovalsHETAS, CE
Clearance50mm from combustible materials
Ensure a minimum 50mm clearance from all combustible materials when installing the flue. Secure each component using the locking band for a robust, tamper-resistant fit. Follow the manufacturer’s guidelines carefully, and utilise the built-in test point and cap for regular gas and draft sampling. Always consult a professional installer if you are unfamiliar with flue installation procedures to guarantee safety and compliance with industry standards.

This flue is compatible with solid fuel, gas, and oil appliances, including woodstoves, gas-coal effect fires, and boilers.

The outer skin is made from 304-grade stainless steel (0.4mm thick) and the inner skin from 316-grade stainless steel (0.4mm thick). The insulation is compressed rockwool with a density of 200kg/m³.

Yes, the TWPro 500mm Testing Length Ø175 Chimney Flue is HETAS approved and CE marked.

The flue parts are secured together using a locking band. Ensure a 50mm clearance from the outside of the flue to any combustible materials.

You must maintain a 50mm clearance from the outer surface of the flue to any combustible materials like wood or plasterboard.

This flue meets the EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 W V2 L50040 O20 standards.

The test point and cap allow safe and efficient entry into the flue for testing gas and draft samples, ensuring optimal performance and safety.
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Wednesday, April 30th. Delivery times of products not in our warehouses depend on product availability and shipping. If you need a definitive delivery time give us a call. If you need faster stove or fireplace delivery please also give us a call. We can sometimes 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 Testing Length 500mm Ø 175 buyers guide

Secure your TWPro Chimney Flue today to enjoy lasting performance and top-tier safety standards.

Your recently viewed products:

Multiple Payment Options- including Klarna, Clearpay, Mastercard, Visa and Paypal