Liner Accesssories - Increasing Adaptor 150-125mm S/S
At a Glance
- - Premium stainless steel construction for long-lasting durability
- - Natural pumice insulation for optimal chimney temperature maintenance
- - Versatile adaptor designed for new builds, extensions, and chimney relining
- - HETAS approved and CE marked for assured safety
- - Ideal for a range of solid fuel and gas/oil appliances such as woodstoves, coal-effect fires, and boilers

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 Isokern flue liner range is lauded for its diverse sizes and versatility. Our Increasing Adaptor 150-125mm Stainless Steel is tailored for various applications, including new builds, extensions, and chimney relining. This adaptor is suitable for solid fuel and gas/oil appliances such as woodstoves, gas coal-effect fires, and boilers, under dry operating conditions.
Constructed from premium stainless steel, this adaptor offers robust, long-lasting performance. What sets Isokern apart is its use of pumice, a natural insulator that optimizes your chimney's temperature, enhancing overall performance and reducing condensation and soot build-up. Approved by HETAS and CE marked, the Isokern Liners ensure compliance with high safety standards.
For installation, refer to our comprehensive guides.
SKU: 59-126357
Technical Specifications | |
---|---|
Material | Stainless Steel |
Adaptor Size | Increasing 150-125mm (ID: 125-150mm / OD: 205mm) |
Designation DM System | EN1858 - T450 N1 D 3 G(00) |
Designation Liner System | EN1857 - T600 N2 D 3 G |
Warranty | 10 Years |
Compliance | HETAS approved, CE marked |
Application | Suitable for solid fuel as well as gas/oil appliances including woodstoves, gas coal-effect fires, and boilers |
Installation Note | Refer to our comprehensive installation guides for precise setup instructions |
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Thursday, April 3rd. 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
At National Flues, we are proud to offer the Liner Accessories - Increasing Adaptor 150-125mm S/S, a top-notch solution for your chimney needs. Rated highly by professionals and homeowners alike, this product seamlessly integrates with your existing chimney systems. We provide reliable nationwide delivery to both retail and trade customers.
The Increasing Adaptor 150-125mm S/S is designed to connect different sized flue pipes, ensuring a smooth transition and optimal performance of your chimney system.
National Flues is a trusted supplier of fireplaces and flues, committed to providing high-quality products and exceptional service to retail and trade customers nationwide. We pride ourselves on competitive pricing and reliable delivery.
