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IL - Adjustable Length - 457mm (18in) - Ø 125 (24-125-16)

National Flues proudly presents the IL Adjustable Length Gas Vent, a premium, twin wall insulated venting solution designed for naturally aspirated domestic gas appliances. This robust and efficient system, featuring an aluminium liner and zalutite exterior, is the ideal choice for safe venting in both internal and external settings. Trusted by professionals across the UK, our gas vent system delivers outstanding performance and reliability for residential applications.
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£71.99
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At a Glance

    Adjustable length design offering effective installation lengths between 75mm to 356mm
    Robust twin wall insulated construction for enhanced safety
    Durable aluminium liner with a corrosion-resistant zalutite outer casing
    Certified to CE and BS EN 9001:2008 standards
    Suitable for both internal and external applications under dry conditions
    Designed for naturally aspirated domestic gas-fired 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.

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Have Questions?
Phone: 01670 206999
Email: [email protected]

The IL Adjustable Length 457mm (18in) Ø 125 Gas Vent is a twin wall insulated gas vent system, meticulously designed for naturally aspirated domestic gas-fired appliances. It’s engineered to perform optimally under negative pressure and dry conditions, supporting flue gas temperatures not exceeding 250°C. This configuration includes an aluminium liner paired with a zalutite outer casing, separated by a 6mm air gap for superior insulation.

Its versatility makes it suitable for both internal and external applications, though it’s not designed for condensing and positive pressure environments. Available in three sizes – 100mm, 125mm, and 150mm diameters – this product adapts to various installation needs. Renowned for its durability and efficiency, the IL Gas Vent System is your go-to solution for secure and reliable flue performance.

SKU: 24-125-16

Technical Specifications
SKU24-125-16
Product NameIL - Adjustable Length - 457mm (18in) - u00d8 125
Design StandardEN 1856-1 T250 N1 D Vm L11030 0(50)
SystemIL
Adjustable Length457mm (18in)
Available Diameters100mm, 125mm, 150mm
Inner MaterialAluminium
Outer MaterialZalutite (zinc-aluminium coated steel)
Fuel CompatibilityGas
ApprovalsCE, BS EN 9001:2008
Temperature LimitUp to 250u00b0C
Distance To Combustibles50mm (2 inches)
Warranty5 year conditional warranty
Joint MethodPush fit and twist lock
Installation of the IL Adjustable Length Gas Vent is straightforward but requires adherence to important safety guidelines. Ensure that the vent maintains a minimum clearance of 50mm from any combustible materials. The telescopic design enables easy adaptation to various installation lengths; simply extend the pipe to the desired length and secure using the built-in twist lock mechanism. Verify that all joints are firmly connected to avoid any gas leak or flue gas escape. It is crucial to follow the manufacturer's instructions and any local building regulations. If installing externally, check that the installation site is sheltered from extreme weather for optimal performance.

This gas vent is designed for naturally aspirated domestic gas-fired appliances with a draught hood or diverter.

Yes, this vent system is suitable for both internal and external applications.

No, it is not suitable for condensing and positive pressure applications.

The gas vent can handle flue gas temperatures up to 250°C.

The product is available in three diameter sizes: 100mm, 125mm, and 150mm.

The vent features an aluminium liner and a zalutite outer casing, separated by a 6mm air gap.

Yes, its telescopic design allows for adjustable length, making it easy to install and fit perfectly into your setup.
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, June 3rd. 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.

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