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Single Wall to Twin Wall Increaser Ø 200 - Ø 250 (2-200-002)
National Flues presents the Single Wall to Twin Wall Increaser Ø 200 - Ø 250, a premium universal adaptor designed for seamless chimney and flue system upgrades. Ideal for woodstoves, oil and gas boilers, and other combustion appliances, this stainless steel increaser is engineered to meet strict safety standards. Whether you call it a flue connector, adaptor, or increaser, it offers outstanding thermal performance backed by HETAS approval and CE marking.
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In Stock
£35.99
Give us a call if you find it cheaper and we'll try to price match.
At a Glance
Seamless connection between single wall and twin wall flue systems
Robust stainless steel construction (304 outer, 316L inner)
High-density 200kg/m3 rockwool insulation for enhanced thermal efficiency
HETAS approved and CE marked for safety
Easy installation with included locking band
Compatible with wood, oil, gas, and low sulphur coal appliances
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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.
The Single Wall to Twin Wall Increaser Ø 200 - Ø 250 is an essential component for connecting single wall to twin wall flue systems, ideal for various solid fuel and gas/oil appliances such as woodstoves, gas coal effect fires, oil and gas boilers. Constructed with a robust outer skin of 304 grade stainless steel and an inner lining of 316 grade stainless steel, each 0.4mm thick, it ensures long-lasting performance. The insulation comprises densely packed (200kg/m3) compressed rockwool, providing superior thermal efficiency and safety.
All parts are meticulously fully welded. With a distance requirement of 50mm to combustibles, this increaser meets the highest safety standards. It's HETAS approved and CE marked, complying with EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 W V2 L50040 O20 designations.
Easy installation is guaranteed with the included locking band, making this adaptor a practical, reliable addition to your chimney flue system.
SKU: 2-200-002
Technical Specifications
SKU
2-200-002
Product Name
Single Wall to Twin Wall Increaser u00d8 200 - u00d8 250
Outer Material
304 Stainless Steel - 0.40mm thick
Inner Material
316L Stainless Steel - 0.40mm thick
Insulation
Densely packed compressed rockwool (200kg/m3)
Approvals
HETAS / CE
Compliance
EN1856-1 T600 N1 W V2 L50040 G50, EN1856-1 T200 W V2 L50040 O20
Compatible Appliances
Wood, Oil, Gas, Low sulphur coal
Distance To Combustibles
50mm
Accessories Included
Locking band
Before installation, ensure that the flue system components are clean and free from obstructions. Begin by aligning the Single Wall to Twin Wall Increaser between your existing single wall pipe and the twin wall system, ensuring that all joints are firmly secured. Maintain a minimum 50mm clearance from any combustible materials. Use the included locking band to fasten the connection securely. Follow all manufacturer guidelines and consult the installation manual for any specific instructions or warnings related to your appliance.
This increaser is suitable for use with solid fuel, gas, and oil appliances, including woodstoves, gas coal effect fires, oil and gas boilers.
The outer skin is made from 304 grade stainless steel, and the inner skin is made from 316 grade stainless steel, both with a thickness of 0.4mm.
Yes, the increaser uses high-density (200kg/m3) compressed rockwool insulation to ensure thermal efficiency and safety.
A distance of 50mm must be maintained from the outside of the flue to any combustible material such as wood or plasterboard.
Yes, installation is straightforward. The parts are secured together using the included locking band.
Absolutely, it is HETAS approved, CE marked, and complies with designations EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 W V2 L50040 O20.
The main purpose is to act as a seamless adaptor, connecting single wall flue pipes to twin wall flue systems while ensuring a smooth and secure transition.
Delivery Information +
We work relentlessly to ensure you get your order fast.
Estimated delivery for this product is Wednesday, April 30th.
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 on a retail basis. Give us a call if you find it cheaper and want to buy from us.
Read our review in our Single Wall to Twin Wall Increaser Ø 200 - Ø 250 buyers guide
Introduction
When upgrading your flue system, it is essential to choose components that enhance both performance and safety. The Single Wall to Twin Wall Increaser Ø 200 - Ø 250 from National Flues offers a reliable solution with its robust design, engineered to deliver a secure, seamless transition between different flue systems. In this comprehensive guide, we will cover every aspect you need to know from technical details to installation tips, ensuring that you feel confident in your purchase.
Product Overview
Designed for Versatility: The increaser has been specifically crafted for connecting single wall flue pipes to twin wall systems. This transition is critical in maintaining the efficiency and safety of your home heating system. Its universal design makes it compatible with a range of appliances including wood-burning stoves, oil and gas boilers, and gas coal effect fires.
Superior Construction: With an outer skin of 304 grade stainless steel and an inner lining of 316L grade stainless steel, each with a uniform thickness of 0.4mm, this increaser is built to withstand the rigours of daily use. The dense, high-quality rockwool insulation (200kg/m3) not only boosts thermal efficiency but also provides enhanced protection against heat loss.
Benefits and Features
Enhanced Safety: The innovative design meets the stringent safety requirements set out by regulatory bodies. It has HETAS approval and is CE marked, ensuring that it will perform safely when used in conjunction with various heating appliances. The required 50mm distance from combustibles adds an extra layer of protection, crucial for both domestic and commercial applications.
Easy Installation: One of the standout features is the ease of installation. The elegant, tapered design coupled with an included locking band means that the increaser can be installed quickly without the need for specialised tools. This makes it an ideal choice for both DIY enthusiasts and professional installers.
Durable Performance: The high-grade materials ensure longevity. Whether installed in a busy household or a commercial setting, the increaser stands up to the test of time, resisting corrosion and wear, which can be common issues in high-temperature flue environments.
Addressing Common Concerns
What if I have doubts about installation?
For many customers, installation might seem like a daunting process. However, the design of the Single Wall to Twin Wall Increaser has been refined to ensure that even those with limited DIY experience can manage a straightforward installation. Detailed instructions and a clear inclusion of essential accessories like the locking band simplify the setup process.
Is the product compatible with my existing flue system?
Compatibility is key when replacing or upgrading chimney components. This increaser is specifically designed for a wide range of flue systems, ensuring a smooth transition from single wall to twin wall configurations. Its specifications comply with industry standards, providing a perfect fit for many installation scenarios. Be sure to check that your system meets the required 50mm clearance to combustibles for optimal safety.
How does it enhance safety?
Safety remains a top priority with this product. The combination of high-quality stainless steel, effective rockwool insulation, and strict compliance with EN1856-1 standards ensures that the increaser not only performs efficiently but also maintains a safe distance from any combustible materials. This minimizes potential risks and gives you the confidence that your installation is both safe and reliable.
What are the long-term benefits?
Investing in a high-quality increaser means you are looking after both immediate performance and long-term durability. The robust construction helps to avoid premature wear, reduces maintenance costs, and provides peace of mind knowing that your heating system is operating at peak efficiency. This can lead to better fuel efficiency for your appliances, further saving you money over time.
Installation Tips
Before beginning your installation, ensure that you have all the necessary tools and that your work area is safe and prepared. Read through the manufacturer’s installation instructions thoroughly and verify that all components, including the locking band, are present. Work steadily and cautiously, maintaining the recommended 50mm clearance from combustibles. If uncertain at any stage, consulting a professional installer can provide additional assurance.
Maintenance and Warranty
Maintaining your new flue system component is simple. Regular visual inspections and cleaning, where necessary, will help preserve its performance and appearance. The product comes with industry-standard warranties that reinforce National Flues' commitment to quality and customer satisfaction.
Conclusion
The Single Wall to Twin Wall Increaser Ø 200 - Ø 250 provides a dependable, easy-to-install solution for modernising your flue system. It marries robust engineering with safety features to deliver a product that not only meets current demands but is built to last. With its industry certifications, high-grade materials, and thoughtful design, it stands out as an integral component for any efficient heating system upgrade.
Every feature and benefit has been meticulously designed to ensure you receive a product that combines safety, performance, and ease of use. By addressing common objections and providing detailed installation guidance, this buyers' guide aims to help you make an informed decision. Whether you are a seasoned professional or a DIY enthusiast, you can trust that National Flues stands behind this product with a commitment to quality that is second to none.
Buy now or call 01670 206 999.
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