IL - Adjustable Length - 305mm (12in) - Ø 125
At a Glance
- - Adjustable length for versatile installation (effective range: 75mm to 203mm)
- - Twin-wall insulated design for optimal thermal performance
- - Durable aluminium liner with a corrosion-resistant zalutite outer shell
- - Engineered for naturally aspirated domestic gas-fired appliances
- - Withstands flue gas temperatures up to 250°C
- - Complies with EN 1856-1 and BS EN 9001:2008 standards
- - Suitable for both internal and external installations

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 IL Adjustable Length 305mm (12in) - Ø 125 is part of a well-regarded twin wall insulated pre-fabricated gas vent system that's been a staple in the UK for over 25 years. Designed specifically for naturally aspirated domestic gas-fired appliances, this vent system is ideal for applications requiring a draught hood or diverter. It operates under negative pressure and dry conditions, withstanding flue gas temperatures up to 250°C.
Available in three key diameters—100mm, 125mm, and 150mm—this vent consists of an aluminium liner encased in a zalutite outer shell, separated by a 6mm air gap for added insulation. Suitable for both internal and external installations, it excels in non-condensing and negative pressure environments.
SKU: 24-125-15
Technical Specifications | |
---|---|
SKU | 24-125-15 |
Model | IL Adjustable Length - 305mm (12in) |
Effective Length Range | 75mm to 203mm |
Nominal Diameter | u00d8 125mm |
Inner Material | Aluminium |
Outer Material | Zalutite (coated steel) |
Operating Temperature | Up to 250u00b0C |
Fuel Compatibility | Gas |
Approvals | CE, BS EN 9001:2008 |
Distance To Combustibles | 50mm (2 Inches) |
Warranty | 5 year conditional warranty |
Joint Method | Push fit and twist lock |
Installation Type | Suitable for both internal & external installations |
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.
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National Flues Ltd Verdict
At National Flues, we highly recommend the IL Adjustable Length 305mm (12in) - Ø 125 for its superior quality and reliability. Trusted for over 25 years, this product stands out for its performance in domestic gas vent applications. Plus, we deliver nationwide and cater to both retail and trade customers!
The IL Adjustable Length 305mm (12in) - Ø 125 is designed for naturally aspirated domestic gas-fired appliances that require effective and reliable gas venting.
National Flues is a leading supplier of fireplaces and flues across the UK, known for unbeatable prices, reliable delivery, and exceptional customer service. We cater to both retail and trade markets with secure online payment options and flexible trade accounts.
