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IL - Length 305mm (12in) - Ø 125 (24-125-13)

Discover the IL Gas Vent Pipe by National Flues – a state-of-the-art, twin wall insulated vent solution designed for naturally aspirated domestic gas appliances. This premium product, known for its robust aluminium liner and corrosion-resistant Zalutite exterior, ensures efficient and safe venting. Ideal for both internal and external installations, our high-performance gas vent pipe meets stringent UK standards and has been a trusted choice for over two decades. Enhance your home’s safety and e Read more...
The price you pay today £40.99
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At a Glance

    High-quality twin wall insulated construction
    Designed for naturally aspirated domestic gas appliances
    Robust aluminium liner paired with a corrosion-resistant Zalutite outer casing
    Features a 6mm air gap for optimum heat management
    Versatile for both internal and external installations
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, July 1st. This is based on current delivery times for this product. Delivery for products not in our warehouses can be delayed because of third party carriers. If you need a stove, or other bulky product, to be delivered by a specific time in the next 7 days then please 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 and you can read in our blog about they types and terms and conditions for warranties. Mi-Flex flue liner, for example, comes with a lifetime guarantee. Give us a call if you want to know about a specific warranty. Returns for damaged items are covered by insurance; non-damaged returns incur return delivery costs.

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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.

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 305mm (12in) Length Gas Vent Pipe - Ø 125 is a high-quality twin wall insulated pre-fabricated vent, designed specifically for naturally aspirated domestic gas-fired appliances. With over two decades of trusted performance in the UK, this gas vent ensures exceptional reliability and durability. Featuring an aluminium liner and a zalutite outer case separated by a 6mm air gap, it maintains efficiency and safety under negative pressure and dry conditions where flue gas temperatures won't exceed 250°C.

Available in various diameter sizes (100mm, 125mm, and 150mm), this vent pipe is versatile for both internal and external installations but is not suited for condensing or positive pressure applications.

SKU: 24-125-13

Technical Specifications
ModelIL - Length 305mm (12in) - u00d8 125
SKU24-125-13
Length305mm fixed length (267mm installed effective length)
Diameter125mm
Inner MaterialAluminium
Outer MaterialZalutite (steel coated with zinc and aluminium)
Air Gap6mm
Applicable FuelsGas
Maximum Flue Gas Temperature250u00b0C
Distance To Combustibles50mm (2 inches)
Joint MethodPush fit and twist lock
Warranty5 year conditional warranty
CertificationsCE, BS EN 9001:2008
Before installation, ensure that the system is placed at least 50mm away from any combustibles. The push fit and twist lock joint method guarantees a secure connection – always check each joint for proper engagement. It is recommended to install the vent on a level surface and verify that all connections are tight. When setting up inside or outside, always follow the manufacturer’s guidelines and local safety regulations. For optimal performance, inspect the vent pipe periodically to ensure that no blockages or damages have occurred.

The IL gas vent is available in three diameter sizes: 100mm, 125mm, and 150mm.

No, the IL gas vent is not suitable for condensing and positive pressure applications.

This gas vent features an aluminium liner and a zalutite outer case, separated by a 6mm air gap.

Yes, the IL gas vent is suitable for both internal and external installations.

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

The IL gas vent system has been used in the UK for over 25 years.

The installed effective length of the 305mm IL gas vent pipe is 267mm.

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