IL - 90° Tee - Ø 125
At a Glance
- High-quality aluminium liner for durability
- Robust zalutite outer case with superior corrosion protection
- Engineered for negative pressure domestic gas vent systems
- Withstands flue gas temperatures up to 250°C
- Easy push fit and twist lock joint method
- Requires an essential tee cap accessory for complete installation

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 - 90° Tee - Ø 125 is part of a highly reliable twin wall insulated gas vent system that has been a staple in UK homes for over a quarter of a century. Designed for naturally aspirated domestic gas-fired appliances equipped with a draught hood or diverter, this system is ideal where the chimney must operate under negative pressure and dry conditions, with flue gas temperatures not exceeding 250°C. Available in three diameters (100mm, 125mm, and 150mm), the IL system comprises an aluminium liner and a robust zalutite outer case, separated by a 6mm air gap.
It is suitable for both internal and external applications but is not intended for condensing and positive pressure applications.
SKU: 24-125-31
Technical Specifications | |
---|---|
SKU | 24-125-31 |
Model | IL - 90u00b0 Tee - u00d8 125 |
Certification | CE, BS EN 9001:2008 |
Flue Gas Temperature | Up to 250u00b0C |
Distance To Combustibles | 50mm (2 inches) |
Inner Material | Aluminium |
Outer Material | Zalutite (coated steel) |
Joint Method | Push fit and twist lock |
Fuel | Gas |
Application | Domestic, negative pressure systems |
Warranty | 5 year conditional warranty |
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 - 90° Tee - Ø 125 is a fantastic choice for any domestic gas vent system, trusted across the UK for over 25 years. At National Flues, we are proud to offer this reliable product with nationwide delivery and services to both retail and trade customers. Rarely beaten on price, we ensure secure online payments and reliable delivery.
The IL - 90° Tee - Ø 125 is designed for use in domestic gas vent systems, particularly those requiring a negative pressure environment and handling flue gas temperatures up to 250°C.
National Flues is a leading supplier of fireplaces and flues across the UK, known for rarely being beaten on price, offering reliable delivery, and catering to both retail and trade customers with secure online payments.
