IL - Gas Vent Terminal - Ø 125
At a Glance
- Over 25 years of proven reliability
- Twin wall insulation with aluminium liner and zalutite outer case
- Operates efficiently in negative pressure and dry conditions
- Suitable for both internal and external installations
- Withstands flue gas temperatures up to 250°C
- Versatile diameter options: 100mm, 125mm, and 150mm

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
Introducing the IL Gas Vent Terminal Ø 125mm, a high-performing twin wall insulated gas vent system that's been trusted in the UK for over 25 years. Perfect for naturally aspirated domestic gas-fired appliances featuring a draught hood or diverter, this vent is engineered to operate under negative pressure in dry conditions with flue gas temperatures up to 250°C. Available in multiple sizes (100mm, 125mm, and 150mm), the IL Gas Vent Terminal combines an aluminium liner and a zalutite outer case, separated by a 6mm air gap, ensuring robust performance and durability.
Ideal for both internal and external installations, this product excels in non-condensing, negative pressure applications.
SKU: 24-125-91
Technical Specifications | |
---|---|
SKU | 24-125-91 |
Item | Gas Vent Terminal - u00d8 125mm |
Standards | EN 1856-1 T250 N1 D Vm L11030 0(50), CE, BS EN 9001:2008 |
Materials | Aluminium liner, Zalutite outer case |
Fuel Type | Gas |
Temperature Limit | 250u00b0C |
Air Gap | 6mm |
Distance To Combustibles | 50mm (2 Inches) |
Warranty | 5 year conditional warranty |
Joint Method | Push-fit and twist lock |
Diameter Options | 100mm, 125mm, 150mm |
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.
National Flues Ltd Verdict
The IL Gas Vent Terminal Ø 125mm stands out for its impeccable quality and reliability. National Flues highly recommends this product for all your domestic gas venting needs. We offer swift, nationwide delivery and serve both retail and trade customers.
The IL Gas Vent Terminal Ø 125mm is designed to facilitate effective venting for domestic gas-fired appliances operating under negative pressure and in dry conditions.
National Flues is a leading provider of high-quality fireplaces and flues across the UK. We pride ourselves on unbeatable prices, reliable delivery, and exceptional service for both retail and trade customers.
