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Upgrade your chimney system with the Screw-FIX Register Plate Adaptor - Ø125mm from National Flues. Designed for secure integration with MI-FLEX flexible flue liners, this adaptor ensures a seamless transition and a gas-tight seal. Perfect for multi-fuel appliances including wood, smokeless coal, gas, and oil, its robust construction and superior performance align with the strict standards of Building Regulations in the UK.
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In Stock
£40.99
Give us a call if you find it cheaper and we'll try to price match.
At a Glance
Compatible with MI-FLEX 316 and 904 flexible flue liners
Withstands temperatures up to 600°C (T600 designation)
Provides a gas-tight seal under the register plate
Long tail single wall connection for secure transition
Designed to work with wood, smokeless coal, gas, and oil appliances
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The Screw-FIX Register Plate Adaptor - Ø 125mm is an essential component for your chimney system, ensuring a perfect fit and secure transition from the connecting flue pipe to the flexible flue liner. Designed for use with MI-FLEX 316 and 904 multi-fuel flexible flue liners, this adaptor is suitable for appliances operating up to 600°C (T600 designation). It is ideal for wood with less than 20% moisture, smokeless coal, gas, and oil appliances.
The adaptor is installed at the base of the chimney beneath the register plate, with a long tail single wall connection on the underside to fit into the connecting pipe. The adaptor sits above the plate where the transition to the flexible flue liner occurs, ensuring no exposed flexible flue and creating a gas-tight seal with the use of fire cement, ceramic rope, or high-temperature sealant. Complying with Building Regulations Document J, it guarantees a completely enclosed flexible liner inside a masonry chimney.
SKU: 25-125-RPA
Technical Specifications
Adaptor Diameter
125mm
Temperature Rating
600u00b0C (T600 designation)
Compatible Flue Liners
MI-FLEX 316 and 904
Installation Type
Screw-FIX with long tail single wall connection
Fuel Compatibility
Wood (under 20% moisture), smokeless coal, gas, and oil
Sealing Accessories
Fire cement, ceramic rope, high-temperature sealant recommended
1. Position the adaptor at the base of the chimney below the register plate. 2. Ensure the long tail single wall connection on the underside fits securely into the connecting flue pipe. 3. Use an approved sealing material such as fire cement, ceramic rope, or high-temperature sealant to guarantee a gas-tight seal. 4. Make sure all components comply with Building Regulations Document J, ensuring the flexible liner is fully enclosed within a masonry chimney. 5. Optional accessories, including sealing materials, are recommended for enhanced safety and performance. Always refer to manufacturer guidelines for precise installation instructions and safety precautions.
The adaptor is installed at the base of the chimney below the register plate.
It can withstand temperatures up to 600°C (T600 designation).
It is suitable for use with wood (less than 20% moisture), smokeless coal, gas, and oil.
Building Regulations Document J requires the flexible flue liner to be completely enclosed inside a masonry chimney. Non-masonry enclosures such as timber or plasterboard boxing are not acceptable.
For a gas-tight seal, use fire cement, ceramic rope, or high-temperature sealant.
Yes, the adaptor is specifically designed for use with both MI-FLEX 316 and 904 multi-fuel flexible flue liners.
Yes, the adaptor has a built-in round cover plate to cover the hole made in the register plate.
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.
The Screw-FIX Register Plate Adaptor - Ø125mm is an essential component for professionals and homeowners looking to upgrade their chimney systems. It is designed to provide a secure, gas-tight transition between your connecting flue pipe and MI-FLEX flexible flue liners, ensuring reliability and safety in operation. In this detailed guide, we will walk you through its features, benefits, installation process, and why this product is ideal for a wide range of multi-fuel appliances.
Key Features and Benefits
Robust Construction: Built to withstand high temperatures of up to 600°C, this adaptor offers the durability needed for demanding heating systems. The robust design is ideal for wood (with less than 20% moisture), smokeless coal, gas, and oil applications.
Seamless Transition: The long tail single wall connection ensures that the adapter fits perfectly into the connecting flue pipe, providing a smooth transition between components. This minimizes any risk of exposed flexible liners and enhances overall system performance.
Compliance with Building Regulations: Designed to meet the stringent requirements of Building Regulations Document J, the adaptor guarantees that your flexible liner remains completely enclosed within a masonry chimney. This is crucial for ensuring safety and efficiency in your heating system.
Optional Accessories: To achieve a truly gas-tight seal, it is recommended to use additional sealing materials. Options such as fire cement, ceramic rope, and high-temperature sealant are available and can be explored to enhance the installation further. These optional accessories ensure a reliable connection and optimal performance.
Installation Process
Preparation: Before beginning the installation, ensure that you have all necessary components and tools. Take a moment to review any optional accessories that might complement the adaptor, such as sealing materials which are essential for creating the gas-tight seal.
Step-by-Step Guide:
- Step 1: Position the adaptor directly beneath the register plate at the base of your chimney. Confirm that all measurements are accurate, ensuring a perfect fit within the operational standards.
- Step 2: Align the long tail connection carefully with the connecting flue pipe. The design facilitates a strong bond between the chimney components, reducing the risk of leaks.
- Step 3: Apply a generous amount of your chosen sealing material around the adaptor’s installation site. Whether you opt for fire cement, ceramic rope, or high-temperature sealant, ensure the application is even and thorough to eliminate any potential gaps.
- Step 4: Confirm that the entire assembly complies with Building Regulations Document J. This step is crucial to ensure safety, particularly in systems that serve multi-fuel appliances.
Addressing Common Concerns
Q: How do I know if my chimney setup is compatible?
A: The Screw-FIX Register Plate Adaptor - Ø125mm is specifically designed for use with MI-FLEX 316 and 904 flexible flue liners, which cater to a wide range of multi-fuel appliances. Check your system’s specifications and compare them to the adaptor’s technical details.
Q: Are the optional sealing materials necessary?
A: While the adaptor is engineered for a gas-tight seal, the use of additional sealing accessories such as fire cement, ceramic rope, or high-temperature sealant significantly enhances the security and longevity of the installation. These options help ensure that the entire system maintains the highest safety standards.
Q: What should I do if I encounter installation issues?
A: Should any difficulties arise during installation, refer back to the manufacturer’s guidelines and installation details provided with the product. For further support, consider contacting National Flues’ customer service for expert advice and technical assistance.
Why Choose National Flues?
National Flues is a trusted name in the UK for fireplace and flue solutions. We pride ourselves on reliability, quality, and excellent customer service catering to both trade and retail customers. With a comprehensive range of products, including innovative components like the Screw-FIX Register Plate Adaptor, our commitment to safe, efficient, and compliant chimney systems is unwavering.
Making the Right Choice
Choosing the right adaptor is integral to the long-term performance and safety of your heating system. The Screw-FIX Register Plate Adaptor - Ø125mm offers a blend of performance, safety, and reliability. With the assurance of high temperature resistance, compliance with regulatory standards, and the availability of optional sealing accessories, it represents a sound investment.
Before purchase, we encourage you to review any additional accessories that might be necessary for your system, ensuring that you achieve a perfect installation every time. If you are unsure, exploring our catalogue of optional installation aids can provide the extra peace of mind you need.
Conclusion and Final Thoughts
The Screw-FIX Register Plate Adaptor is more than just a component—it is a critical element in achieving a fully compliant, safe, and efficient chimney system. Its innovative design, robust construction, and ease of installation make it a standout product within our range of solutions. Whether you are updating an existing system or embarking on a new installation, consider the adaptor’s seamless integration and the enhanced safety features that come with the proper use of optional sealing accessories.
For more detailed technical support or further assistance in choosing the right optional accessories to complete your setup, National Flues is here to help. Our dedicated team is ready to provide guidance to ensure you get the best performance out of your chimneys. Buy now or call 01670 206 999.
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