IL - Length 152mm (6in) - Ø 125
At a Glance
- - Fixed effective length of 114mm ensuring accurate fit
- - Twin-wall insulated design for optimal thermal performance
- - Robust aluminium liner paired with a protective Zalutite outer casing
- - Push fit and twist lock joint method for quick, secure installation
- - Suitable for both internal and external applications
- - Trusted quality with over 25 years of industry experience

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 152mm (6in) Length - Ø 125 Gas Vent Pipe is an essential component for naturally aspirated domestic gas-fired appliances. Boasting a twin wall insulated design, this pre-fabricated gas vent has a stellar reputation for quality and reliability, built over the past 25 years in the UK. Available in three diameter sizes—100mm, 125mm, and 150mm—this system is meticulously constructed with an aluminium liner and a zalutite outer case, separated by a 6mm air gap.
It's suitable for both internal and external installations but not recommended for condensing and positive pressure applications. It performs optimally under negative pressure and dry conditions, with flue gas temperatures not exceeding 250°C, making it an ideal choice for high-efficiency gas appliances with a draught hood or diverter.
SKU: 24-125-14
Technical Specifications | |
---|---|
SKU | 24-125-14 |
Dimensions | Length 152mm; Diameter u00d8125mm |
Effective Length | 114mm |
Inner Material | Aluminium |
Outer Material | Zalutite (zinc-aluminium coated steel) |
Max Flue Gas Temperature | 250u00b0C |
Minimum Distance To Combustibles | 50mm (2 inches) |
Installation | Suitable for both internal and external applications (Not for condensing or positive pressure applications) |
Joint Method | Push fit and twist lock |
Warranty | 5 year conditional warranty |
Fuels Compatible | Gas |
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
The IL - 152mm (6in) Length - Ø 125 Gas Vent Pipe epitomises quality and reliability. It has been a trusted solution in the UK for over 25 years. Perfect for both retail and trade customers, we ensure competitive pricing and reliable nationwide delivery.
The IL Gas Vent Pipe is designed for safely venting flue gases from naturally aspirated domestic gas-fired appliances, ensuring efficient operation.
National Flues is a leading supplier of fireplaces and flues in the UK, offering competitive prices, reliable delivery, and secure online payments. Serving both retail and trade customers nationwide, we pride ourselves on exceptional service and product quality.
