100mm (4 inch) Flue Liner 316L for Gas and Oil (316L Grade)
At a Glance
- - Constructed from premium 316L stainless steel for superior corrosion resistance and longevity
- - Ultra-thin 0.10mm design with five deliberate convolutions for enhanced durability
- - Secure TRIPLELOCK joint system ensuring leak-proof, efficient performance
- - Suitable for both gas and oil appliances (oil up to 28 seconds)
- - Withstands temperatures up to 260°C for reliable operation
- - Meets critical BS 715 and BS EN 1856:2 safety standards
- - Optimised for a pull-down installation method for hassle-free fitting
- - Backed by a 10 Year Conditional Warranty, offering peace of mind

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
Our 100mm (4 inch) Flue Liner is designed to be a robust and efficient solution for relining masonry chimneys. Constructed from high-grade 316L stainless steel, this flue liner boasts a thickness of 0.10mm and features five convolutions between each seam, making it exceptionally durable. The unique TRIPLELOCK seal ensures maximum security and efficiency, complying with both BS 715 and BS EN 1856:2 standards.
Ideal for use with gas appliances (as specified by the fire manufacturer) and oil appliances up to 28 seconds, this liner can handle temperatures up to 260°C. Installation is straightforward with a pull-down method and secure fitting process. Maintenance is minimal, requiring at least an annual inspection.
With National Flues' commitment to quality and affordability, this flue liner stands out as an excellent choice for both retail and trade customers.
SKU: 4Z-100-1
Technical Specifications | |
---|---|
Diameter | 100mm (4 inch) |
Material | 316L Grade Stainless Steel |
Thickness | 0.10mm |
Convolutions | 5 between each seam |
Joint Method | Triplelock |
Fuel Type | Gas and Oil (oil up to 28 seconds) |
Max Temperature | 260u00b0C |
Compliance | BS 715, BS EN 1856:2 |
Installation | Pull-down, top-of-chimney secure fitting |
Warranty | 10 Year Conditional Warranty |
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.
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National Flues Ltd Verdict
The 100mm (4 inch) Triplelock 316L Stainless Steel Flue Liner is a top-quality choice for relining masonry chimneys, suitable for gas and oil appliances. With our reliable nationwide delivery and competitive prices, this flue liner is a superb option for both retail and trade customers.
This product is designed for relining masonry chimneys, making them suitable for gas and oil appliances.
National Flues is a leading supplier of fireplaces and flues in the UK, offering unbeatable prices and reliable delivery to both retail and trade customers nationwide.
