IL - Firestop Spacer - Ø 150
At a Glance
- Trusted UK product with over 25 years of proven performance
- Robust aluminium liner paired with a corrosion-resistant zalutite outer casing
- Ensures a safe 50mm (2 Inches) clearance from combustible materials
- Easy push fit and twist lock installation method
- Suitable for both internal and external applications (not for condensing/positive pressure)
- Meets CE and BS EN 9001:2008 safety standards

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 Firestop Spacer Ø 150 is an essential component for any efficient and safe domestic gas venting system. A part of the twin wall insulated pre-fabricated domestic gas vent lineup, this spacer has been trusted in the UK for over two decades for its superior quality and reliability. The IL gas vent system is specifically designed for naturally aspirated domestic gas-fired appliances featuring a draught hood or diverter.
This unit operates under negative pressure, dry conditions and supports flue gas temperatures that do not exceed 250°C. Available in three convenient sizes - 100mm, 125mm, and 150mm - this product is crafted with an aluminium liner and a sturdy zalutite outer case, separated by a precise 6mm air gap. Ideal for both internal and external applications, it is imperative to note that it is not suitable for condensing and positive pressure applications.
Its design flexibility makes it an excellent choice for a variety of installations.
SKU: 24-150-54
Technical Specifications | |
---|---|
SKU | 24-150-54 |
Item | Firestop Spacer - u00d8 150 |
Designation | EN 1856-1 T250 N1 D Vm L11030 0(50) |
System | IL |
Inner Material | Aluminium |
Outer Material | Zalutite (coated steel for corrosion protection) |
Fuels | Gas |
Approvals | CE, BS EN 9001:2008 |
Distance To Combustibles | 50mm (2 Inches) |
Warranty | 5-year conditional warranty |
Joint Method | Push fit and twist lock |
Operating Temperature | Up to 250u00b0C |
Applications | Internal and External (not for condensing or positive pressure applications) |
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.
Compatible and other products that may be of interest...
National Flues Ltd Verdict
Our IL Firestop Spacer Ø 150 is an exceptional product that has proven reliable for over 25 years. Delivering quality and peace of mind for both retail and trade customers, it's a superb choice for any gas-fired appliance installation. Enjoy swift, nationwide delivery and competitive pricing with National Flues.
The IL Firestop Spacer Ø 150 is used to maintain safe clearance from combustible materials when installing a twin wall insulated gas vent system, ensuring efficient and secure venting for domestic gas-fired appliances.
National Flues is a trusted supplier of high-quality fireplaces and flues across the UK. Known for competitive pricing and reliable delivery, they cater to both retail and trade customers nationwide.
