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National Flues proudly presents the KC Twin Wall to Flex Adaptor - Ø125, a top-notch chimney connector designed for reliability and performance. This versatile adaptor is engineered for seamless integration with twin wall systems and flexible liners, ideal for solid fuel, gas, and oil appliances. With its premium stainless steel construction and superior rockwool insulation, this product delivers not only on durability but also on safety and efficiency. Enhance your chimney system with this exceptional flex adaptor, the perfect solution for modern and energy-efficient installations.
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£42.49
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At a Glance
HETAS approved and CE marked for certified safety
Constructed from 304 and 316-grade stainless steel at 0.40mm thickness
High-density compressed rockwool insulation (128kg/m³) for excellent thermal resistance
Secure locking band connection ensures robust installation
Compatible with solid fuel, gas, and oil appliances
Meets EN1856-1 standards for thermal performance and safety
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Please Note: All dimensions refer to the internal diameter of flues.
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“I saved 20% on my purchase compared to other retailers. Exceptional service!” – Jane D.
The KC Twin Wall to Flex Adaptor Ø125 is an essential component for safely connecting your twin wall chimney system to flexible liners, particularly useful in solid fuel, gas, and oil appliance setups such as woodstoves, gas coal effect fires, and oil boilers. Constructed with a durable outer skin of 304-grade stainless steel at 0.4mm thickness, and an inner skin of 316-grade stainless steel at 0.4mm thickness, this adaptor ensures longevity and strong performance. The high-density, compressed rockwool insulation (128kg/m3) provides excellent thermal resistance.
All parts are fully welded to ensure a secure fit and compliance with distance regulations; it requires a 60mm distance from combustibles. The KC Adaptor is HETAS approved and CE marked for your safety and peace of mind, with designations EN1856-1 T600 N1 W V2 L50040 G60 and EN1856-1 T200 P1 W V2 L50040 O20. Easy to install using a locking band, it ensures a robust connection, making it an ideal choice for both professional and DIY installations.
SKU: 10-125-099
Technical Specifications
Product Name
KC - Twin Wall to Flex Adaptor - u00d8125
Outer Material
304 Stainless Steel - 0.40mm
Inner Material
316 Stainless Steel - 0.40mm
Insulation
Compressed Rockwool, 128kg/mu00b3
Approvals
HETAS / CE
Designation Numbers
EN1856-1 T600 N1 W V2 L50040 G60, EN1856-1 T200 P1 W V2 L50040 O20
Fuel Compatibility
Wood, Oil, Gas, Low sulphur coal
Clearance Requirement
60mm distance to combustibles
Warranty
12 Years
• Ensure a minimum clearance of 60mm from any combustible material.
• Position the adaptor within an existing class 1 chimney system to prevent exposure of the flexible liner.
• Secure the connection using the provided locking band for a firm, safe coupling.
• Always refer to the manufacturer's installation instructions and safety guidelines to maintain compliance with building regulations.
• For DIY installations, verify that all components are correctly aligned and securely fastened before use.
This adaptor is suitable for solid fuel, gas, and oil appliances including woodstoves, gas coal effect fires, and oil boilers.
The adaptor has an outer skin made from 304 grade stainless steel and an inner skin made from 316 grade stainless steel, both at 0.4mm thickness.
Yes, it is HETAS approved and CE marked, meeting the standards EN1856-1 T600 N1 W V2 L50040 G60 and EN1856-1 T200 P1 W V2 L50040 O20.
It is installed using a locking band to secure the twin wall chimney parts together, ensuring a 60mm distance from any combustible materials.
The designation numbers reflect compliance with specific European standards for thermal performance and safety, ensuring the adaptor meets high-quality and safety benchmarks.
Yes, the KC Twin Wall to Flex Adaptor is suitable for DIY enthusiasts as well as professional installations, ensuring a secure and safe connection.
The adaptor uses compressed rockwool insulation with a density of 128kg/m³, providing excellent thermal resistance.
Delivery Information +
We work relentlessly to ensure you get your order fast.
Estimated delivery for this product is Wednesday, April 30th. Delivery times of products not in our warehouses depend on product availability and shipping. If you need a definitive delivery time give us a call.
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We can sometimes reduce longer lead times if we pay the carrier £25 for express delivery.
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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.
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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 KC - Twin Wall to Flex Adaptor - Ø 125 buyers guide
Introduction
The KC Twin Wall to Flex Adaptor - Ø125 from National Flues is an integral component designed to ensure a safe and efficient transition between twin wall chimney systems and flexible liners. Whether you are a tradesperson on the job or a DIY enthusiast tackling your own home installation, understanding the benefits and installation requirements of this adaptor will help you achieve a secure, high-performance chimney system.
Key Features and Benefits
This adaptor is engineered with a focus on durability and safety. Key features include its dual-layer construction using 304-grade and 316-grade stainless steel, ensuring resilience under high temperatures. The 0.40mm thickness of both the outer and inner layers, combined with compressed rockwool insulation at 128kg/m³, provides excellent thermal resistance. This means the adaptor not only withstands the rigours of high heat but also contributes to energy efficiency by minimising heat loss.
Another notable benefit is its secure locking band connection, which simplifies the installation process. This system ensures that the twin wall system is firmly joined to the flexible liner, reducing the potential for leaks or misalignments that could compromise safety. Such robust construction meets stringent European standards, being HETAS approved and CE marked, which is essential in today’s market where safety and compliance are non-negotiable.
Technical Specifications and Their Significance
Understanding the technical details of the KC Twin Wall to Flex Adaptor is important for ensuring it fits your specific needs. The outer shell is made from 304 stainless steel and the inner lining from 316 stainless steel, both at a precise thickness of 0.40mm. These materials are chosen for their resistance to corrosion and high temperature, which is critical for the longevity of your installation. Additionally, the compact rockwool insulation provides not only thermal efficiency but also a degree of sound dampening, further enhancing the performance of your chimney system.
The product is compliant with several designations such as EN1856-1 T600 N1 W V2 L50040 G60 and EN1856-1 T200 P1 W V2 L50040 O20. These standards ensure that the adaptor performs reliably under demanding conditions and meets safety benchmarks required for modern heating systems. Whether you use wood, oil, gas, or low sulphur coal, this adaptor is designed to handle diverse fuel types safely and efficiently.
Installation and Best Practices
Installing the KC Twin Wall to Flex Adaptor is straightforward, but attention to detail is crucial. It is designed to be installed within an existing class 1 chimney system. One of the key steps is ensuring a minimum clearance of 60mm from any combustible materials. This clearance not only adheres to safety regulations but also prevents potential hazards due to excessive heat exposure.
The adaptor is fitted using a locking band system, which provides a secure connection that is both reliable and easy to achieve, even for those with limited installation experience. Always refer to the installation instructions provided with the product. It is also advisable to check local building regulations to ensure full compliance and to maintain the integrity of the chimney system over time.
The Versatility of the KC Twin Wall to Flex Adaptor
One of the standout features of this adaptor is its versatility. It is compatible with a range of heating appliances, including woodstoves, gas coal effect fires, and oil boilers. This makes it an ideal solution for a variety of residential and commercial applications. The ability to work seamlessly with multiple fuel types means that homeowners and installers alike have the flexibility to choose or upgrade their heating systems without compromising on safety or performance.
Moreover, the design of the adaptor allows for both professional and DIY installations. For professionals, this means quicker installations with a reduced risk of errors. For DIY enthusiasts, it offers a user-friendly solution that does not require extensive technical knowledge, yet it still meets all the necessary safety and performance standards. This balance of simplicity and reliability is a key selling point for the product.
Complementary Accessories and Enhancements
While the KC Twin Wall to Flex Adaptor is a critical piece of your chimney system, it is often beneficial to explore additional accessories that can further enhance performance and safety. Accessories such as flue collars, additional insulation products, and specialised chimney caps can contribute to a more efficient and resilient installation. National Flues offers a range of complementary products designed to work in harmony with your adaptor, ensuring that your entire chimney system is optimised for both safety and efficiency.
Final Thoughts
In the realm of chimney and flue installations, every component plays a vital role in ensuring both functionality and safety. The KC Twin Wall to Flex Adaptor - Ø125 stands out as a market-leading solution due to its robust construction, compliance with stringent safety standards, and ease of installation. Whether you are upgrading an existing system or embarking on a new installation, this adaptor provides the reliability and performance you need.
Its thoughtfully engineered design, which incorporates dual-layer stainless steel and high-density insulation, ensures that it can handle the demands of modern heating systems. By maintaining a secure, safe connection between twin wall systems and flexible liners, it not only enhances the overall efficiency of your chimney but also contributes to a safer living environment.
Investing in the right components is essential for the long-term success of your heating system. With the KC Twin Wall to Flex Adaptor, you gain peace of mind knowing that every detail has been meticulously considered, from material selection to compliance and installation ease. National Flues is dedicated to providing high-quality products that meet the evolving needs of both trade professionals and homeowners.
For those considering an upgrade or a new installation, this adaptor represents a smart investment that promises durability, enhanced safety, and optimal performance. Its versatile design means that it adapts effortlessly to a variety of heating scenarios, ensuring you are ready for whatever fuel source you choose to use.
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