Welcome to National Flues and Fireplaces Ltd. We use cookies to enable functionality on this website, to collect data to improve the website, and to enhance your experience on here. By continuing, you agree to our use of cookies as detailed in our Cookie Policy. Enjoy your visit & call our experts on 01670 206 999 if you need any help with products!
Cookie Preferences
We use different types of cookies for various purposes. Please select which you allow:
Long Tail MI-FLEX Adaptor - Ø 125 (20-125-MAELT)
Discover the robust and reliable Long Tail MI-FLEX Adaptor - Ø 125 from National Flues, designed specifically for seamless integration between rigid single wall flue systems and MI-FLEX flexible liners. This high-performance adaptor is built to deliver outstanding performance in a variety of heating applications, whether you’re using wood, oil, gas, or smokeless coal. With a construction of superior 316L stainless steel and an ability to withstand temperatures of up to 600°C, this product stands as a testament to quality, durability and safety. Experience a secure, gas-tight connection that complies with stringent UK Building Regulations, ensuring peace of mind and efficiency in your chimney Read More...
Discover the robust and reliable Long Tail MI-FLEX Adaptor - Ø 125 from National Flues, designed specifically for seamless integration between rigid single wall flue systems and MI-FLEX flexible liners. This high-performance adaptor is built to deliver outstanding performance in a variety of heating applications, whether you’re using wood, oil, gas, or smokeless coal. With a construction of superior 316L stainless steel and an ability to withstand temperatures of up to 600°C, this product stands as a testament to quality, durability and safety. Experience a secure, gas-tight connection that complies with stringent UK Building Regulations, ensuring peace of mind and efficiency in your chimney system. Less...
In Stock
£32.99
Give us a call if you find it cheaper and we'll try to price match.
At a Glance
Crafted from 0.6mm 316L stainless steel for exceptional durability Designed to connect rigid single wall flue systems with MI-FLEX flexible liners Withstands temperatures up to 600°C for safe operation Compatible with wood (under 20% moisture), oil, gas, and smokeless coal Ensures a gas-tight seal when installed with appropriate high-temperature sealant
×
Email Product
Enter your email address to send the product details:
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 Long Tail MI-FLEX Adaptor - Ø 125 is an invaluable component for any chimney system. Crafted from 0.6mm 316 stainless steel, this adaptor serves as a critical connection between a rigid single wall flue system and MI-FLEX flexible flue liners. Designed to withstand temperatures up to 600°C, it’s suitable for various fuel types, including wood with less than 20% moisture, smokeless coal, gas, and oil.
As per Building Regulations Document J, ensure it is fully enclosed within a masonry chimney for optimal performance and safety. The bottom fixing mechanism guarantees a seamless transition between flue systems, providing a gas-tight seal when properly installed with fire cement, ceramic rope, tape, or high-temperature sealant. Regular maintenance and sweeping by a competent person are crucial for longevity and efficiency, particularly for solid fuel applications.
Trust HETAS registered sweeps for professional chimney care.
SKU: 20-125-MAELT
Technical Specifications
Material
316L Stainless Steel
Wall Thickness
0.6mm
Diameter
Ø 125
Maximum Temperature
600°C
Fuel Compatibility
Wood (<20% moisture), Oil, Gas, Smokeless Coal
Approvals
HETAS / CE
System
MI-FLEX Accessories MF20
Finish
Natural / Stainless Steel
Ensure the adaptor is fully enclosed within a masonry chimney as specified by Building Regulations Document J. Always secure the bottom fixing into the connecting flue below, and the flexible liner above. For a gas-tight seal, apply fire cement, ceramic rope, high-temperature tape, or sealant as recommended. It is crucial that the installation is performed by a competent person, with regular maintenance and sweeping of the chimney system to avoid build-up and potential hazards. Do not use timber or plasterboard enclosures, and follow manufacturer guidelines closely to maintain the integrity and safety of your installation.
The Long Tail MI-FLEX Adaptor is used to connect a rigid single wall flue system to a MI-FLEX flexible flue liner, creating a secure and efficient transitional joint.
The adaptor is made from 0.6mm 316 stainless steel, known for its durability and resistance to high temperatures.
Yes, it is suitable for use with wood (less than 20% moisture), smokeless coal, gas, and oil.
Yes, the adaptor must be fully enclosed inside a masonry chimney, as timber or plasterboard enclosures are not acceptable according to Building Regulations Document J.
Ensure the bottom fixing is secured into the connecting flue below and the flexible flue liner above. Use fire cement, ceramic rope, tape, or high-temperature sealant to create a gas-tight seal.
Regular sweeping and maintenance of the chimney system by a competent person are essential. For solid fuel applications, it's recommended to clean the chimney twice a year.
For solid fuel applications, you can find HETAS registered chimney sweeps at www.hetas.co.uk.
Delivery Information +
We work relentlessly to ensure you get your order fast.
Estimated delivery for this product is Monday, May 19th. 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.
If you need faster stove or fireplace delivery please also give us a call.
We can sometimes 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 Long Tail MI-FLEX Adaptor - Ø 125 buyers guide
Introduction
Welcome to the comprehensive buyer's guide for the Long Tail MI-FLEX Adaptor - Ø 125, brought to you by National Flues. If you are looking to optimise your chimney system, this guide will help you understand not only why this product is crucial but also how to integrate it into your setup for superior performance and safety.
Why the Adaptor is Essential
The Long Tail MI-FLEX Adaptor is a critical element for anyone installing or upgrading a chimney system. Designed to securely connect a rigid single wall flue system to a MI-FLEX flexible flue liner, this adaptor ensures a reliable and efficient transition that is vital for maintaining the system's performance and safety. This connection is instrumental in ensuring that your heating setup complies with the latest Building Regulations, particularly Document J, which sets the standards for safe and efficient chimney installations.
Product Features and Their Benefits
One of the standout features of this adaptor is its construction from 0.6mm 316L stainless steel. This high-quality material not only boasts superior durability but also offers excellent resistance to corrosion, meaning that your installation will remain robust for years to come. Additionally, the adaptor's design is intended to handle temperatures of up to 600°C, making it suitable for a variety of fuels, including wood with a moisture content of less than 20%, oil, gas, and smokeless coal. The secure fixing mechanism further ensures that when installed with fire cement, ceramic rope, or a high-temperature sealant, your chimney will maintain a gas-tight and leak-proof connection.
Installation Process
Preparation
Before installation, it is essential to gather all the necessary tools and accessories. This includes fire cement, ceramic rope, or high-temperature sealant, as these materials will be used to ensure a gas-tight seal. Read the manufacturer’s instructions carefully and verify that your chimney is a masonry enclosure as required by Building Regulations Document J.
Step-by-Step Installation
1. Begin by preparing the area where the adaptor will be installed. Make sure the masonry is in good condition and free from deterioration.
2. Place the adaptor in position ensuring it aligns perfectly between the rigid flue and the MI-FLEX liner.
3. Secure the bottom fixing into the connecting flue system below, and ensure that the flexible liner is properly positioned above.
4. Apply a generous amount of fire cement or ceramic rope along the connection area, ensuring that the joint is fully sealed for a gas-tight fit.
5. Allow sufficient drying and curing time as per the product instructions before commencing normal operation.
Post-Installation Maintenance
Regular maintenance, including sweeping by a HETAS registered chimney sweep, is highly recommended. This will not only prolong the adaptor’s lifespan but also ensure that the entire chimney system functions at its best. Maintenance should be scheduled at least twice a year, especially if you are utilising solid fuels which are known to produce considerable soot and creosote.
Addressing Common Concerns
Safety and Compliance
Some installers might wonder about the safety and adherence to building regulations. The Long Tail MI-FLEX Adaptor is fully compliant with UK standards, including HETAS and CE approvals. Its design and material composition ensure that it can manage high temperatures and a variety of fuels safely.
Durability
Concerns about wear and tear are mitigated by the use of premium 316L stainless steel. This material is renowned for its resilience under high-temperature conditions and corrosive environments, guaranteeing that your investment lasts for many years.
Ease of Installation
While the installation process does require attention to detail, it is straightforward when following the provided guidelines. For those who may be unsure, professional installation is always recommended to ensure that the adaptor is fitted correctly and safely.
Optional Accessories
For a complete chimney system, consider pairing the adaptor with other high-quality accessories from National Flues. From expansion joints to sealing kits, our range of optional accessories is designed to complement your installation perfectly, ensuring that every component works harmoniously for peak performance.
Why Choose National Flues?
National Flues is a trusted name in the industry, renowned for unbeatable prices, reliable nationwide delivery, and a commitment to quality. Whether you are a trade professional or a retail customer, choosing National Flues means opting for excellence in both product performance and customer service. Our products are rigorously tested and conform to all relevant British standards, offering you peace of mind with every purchase.
Final Thoughts
Investing in the Long Tail MI-FLEX Adaptor - Ø 125 is not just about purchasing a component; it is about enhancing the safety, efficiency, and longevity of your entire chimney system. Remember, a well-maintained and correctly installed chimney is vital for the safe operation of your heating system. With this adaptor, you can be sure of a reliable, gas-tight connection that stands up to the rigours of high temperatures and variable fuels.
Before making your final decision, always consider the long-term benefits of using high-quality, well-engineered components. Proper installation and regular maintenance are key to maximising the performance and durability of your chimney installation. For additional accessories, you are encouraged to explore the full range available, ensuring that every part of your system is perfectly aligned and functioning optimally.
Add to cart now or call 01670 206 999.
Choose the Long Tail MI-FLEX Adaptor now to guarantee safety and performance—your chimney system deserves the best.
×
Select Product Options
×
Product added
Would you like to keep shopping or head to checkout?
Click To Call Our Experts