Inspection Length 500mm Ø 125
At a Glance
- - HETAS approved & CE marked
- - Twin wall construction: 304 outer & 316 inner stainless steel
- - Built-in sweeping access with a large rectangular door
- - Insulated with high-density compressed rockwool (200kg/m3)
- - Secure Locking Band system for easy installation
- - 50mm safe distance from combustibles
- - Versatile use with solid fuel and gas/oil 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 Inspection Length 500mm Ø 125 is designed for versatility and durability in your chimney system. This pipe is suitable for use with solid fuel and gas/oil appliances, including wood stoves, gas coal effect fires, and oil and gas boilers. Constructed with an outer skin of 304 grade stainless steel and an inner skin of 316 grade stainless steel, both 0.4mm thick, this flue ensures longevity and safety.
It is insulated with compressed rockwool at a density of 200kg/m3 for superb thermal performance. Fully welded, the pipe maintains a safe distance of 50mm from any combustible materials. TWPro's HETAS approval and CE marking underline its high safety and quality standards.
Installing this twin wall insulated chimney pipe is straightforward, thanks to the secure Locking Band system. Drastically reduce your maintenance with its convenient built-in sweeping access, provided via a large rectangular door.
SKU: 2-125-020
Technical Specifications | |
---|---|
SKU | 2-125-020 |
Product Name | Inspection Length 500mm u00d8 125 |
Inner Material | 316L Stainless Steel - 0.40mm thick |
Outer Material | 304 Stainless Steel - 0.40mm thick |
Insulation | Compressed Rockwool at 200kg/m3 |
Length | 500mm |
Diameter | 125mm |
Approvals | HETAS / CE |
Installation Feature | Locking Band system with built-in sweeping access |
Safe Distance | 50mm from combustibles |
Compatible Fuels | Wood, Oil, Gas, Low sulphur coal |
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 are proud to offer the Inspection Length 500mm Ø 125, a top-quality twin wall chimney pipe perfect for a variety of heating systems. Enjoy reliable delivery nationwide, whether you're a retail or trade customer.
The Inspection Length 500mm Ø 125 is designed to provide a dependable and safe chimney flue system for solid fuel and gas/oil appliances.
TWPro is renowned for their high-quality, reliable flue systems that meet rigorous safety and performance standards, making them a trusted choice among homeowners and professionals alike.
