Gas Cowl Ø 125
At a Glance
- - Specifically designed for gas appliances
- - Premium stainless steel construction (Outer: 304, Inner: 316)
- - 0.40mm thick walls for robust durability
- - Superior thermal protection with compressed rockwool insulation (200kg/m³)
- - HETAS Approved and CE marked for safety and performance compliance
- - Easy, secure installation using the Locking Band
- - Maintains a required 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: [email protected]
- Info
- Specs
- Install
- FAQs
The Gas Cowl Ø 125 is expertly designed for optimal performance with gas appliances. Ideal for use with woodstoves, gas coal effect fires, oil and gas boilers, and other gas appliances, this cowl ensures safe and efficient venting of exhaust gases. Constructed with an outer skin of 304 grade stainless steel and an inner skin of 316 grade stainless steel, both at a thickness of 0.4mm, it boasts exceptional durability and resistance to corrosion.
Between the layers, compressed rockwool insulation with a density of 200kg/m3 provides superior thermal protection. TJWPro Twin Wall Insulated Chimney parts, including this cowl, are fully welded and come with HETAS approval and CE marking for assured quality. A 50mm distance must be maintained from any combustible material, as mandated by safety standards.
Installation is straightforward with the use of a Locking Band, ensuring a secure fit.
SKU: 2-125-092
Technical Specifications | |
---|---|
SKU | 2-125-092 |
Designation | EN1856-1 T600 N1 W V2 L50040 G50 |
Material - Outer | 304 Stainless Steel, 0.40mm thick |
Material - Inner | 316 Stainless Steel, 0.40mm thick |
Insulation | Compressed Rockwool, 200kg/m³ |
Approved | HETAS and CE |
Distance To Combustibles | 50mm |
Suitable Fuels | Gas, Oil, Wood, Low sulphur coal |
Compatibility | Gas appliances only |
Installation Method | Locking Band for Twin Wall Insulated Chimney parts |
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 Gas Cowl Ø 125 is an excellent choice for anyone looking for a reliable and sturdy flue terminal for gas appliances. Backed by HETAS approval and boasting premium-grade materials, this cowl ensures safety and efficiency. At National Flues, we are rarely beaten on price and offer dependable nationwide delivery to both retail and trade customers.
The Gas Cowl Ø 125 is designed for the ventilation of gas appliances, ensuring safe and efficient exhaust of gases from devices like woodstoves, gas fires, and boilers.
National Flues is a leading supplier of fireplaces and flues across the UK. Known for competitive pricing and reliable delivery, we cater to both retail and trade customers with secure online payment options.
