IL - Tee Cap - Ø 125
At a Glance
- - Designed specifically for twin wall insulated gas vent systems
- - Constructed with an aluminium inner liner and durable zalutite outer case
- - Equipped with a 6mm air gap for optimum insulation
- - Engineered for naturally aspirated gas-fired appliances under negative pressure
- - Certified and tested to meet EN 1856-1 T250 N1 standards
- - Available in multiple sizes (100mm, 125mm, and 150mm) for versatile 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 - Tee Cap - Ø 125 is an essential component in our twin wall insulated pre-fabricated domestic gas vent systems. Designed with over 25 years of industry experience, this tee cap delivers unmatched quality and reliability. It's specifically created for naturally aspirated gas-fired appliances equipped with a draught hood or diverter.
Notably, it operates under negative pressure and dry conditions, making it ideal for a variety of domestic settings where flue gas temperatures do not exceed 250°C.This versatile product is available in three diameter sizes: 100mm, 125mm, and 150mm. It features a robust construction with an aluminium liner and a durable zalutite outer case, separated by a 6mm air gap for optimum insulation. The IL - Tee Cap - Ø 125 is suitable for both internal and external applications but is not compatible with condensing or positive pressure environments.
Whether for a new installation or a retrofit, this tee cap ensures efficient and safe operation, meeting high standards of performance.
SKU: 24-125-32
Technical Specifications | |
---|---|
SKU | 24-125-32 |
Product Name | IL - Tee Cap - u00d8 125 |
System | IL |
Inner Material | Aluminium |
Outer Material | Zalutite (steel with zinc and aluminium coating) |
Fuel Compatibility | Gas |
Operating Temperature | Up to 250u00b0C |
Joint Method | Push fit and twist lock |
Distance To Combustibles | 50mm (2 Inches) |
Warranty | 5 Year Conditional |
Approvals | CE, BS EN 9001:2008 |
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, April 8th. 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 - Tee Cap - Ø 125 is a solid choice for any domestic gas venting needs. With over 25 years of proven quality and reliability, we’re proud to offer this in our extensive range. National Flues is your go-to supplier for fireplaces and flues, serving both retail and trade customers nationwide with unbeatable prices and dependable delivery.
The IL - Tee Cap - Ø 125 is used to securely cap off the end of a 90-degree tee in a twin wall insulated gas vent system for domestic gas appliances.
National Flues has been a leading supplier of fireplaces and flues in the UK, known for unbeatable prices, reliable delivery, and excellent service to both retail and trade customers nationwide.
