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Joiner - Ø 100 (20-100-J)
National Flues presents the Joiner - Ø 100, a premium chimney accessory designed to join MI-FLEX 316 and 904 flue liners seamlessly. This high-performance joiner is an essential component for multi-fuel chimneys, ensuring safe and efficient operation. Ideal for connecting extended sections of flexible liners, our joiner is the perfect solution for creating continuous, high-quality chimney systems that meet all relevant UK building standards.
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£22.99
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At a Glance
Reliable joining of multi-fuel liners
Constructed from durable 316L stainless steel
Withstands temperatures up to 600°C (T600 designation)
Fully compliant with HETAS and CE standards
Designed exclusively for masonry chimney installations
Perfect for extending the length of MI-FLEX 316 and 904 liners
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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 Joiner - Ø 100 is a critical component in our MI-FLEX accessory range, engineered specifically for joining sections of MI-FLEX 316 and 904 flexible flue liners. Perfectly tailored for creating complete chimney systems, this accessory ensures seamless integration with your multi-fuel flexible flue liner installations. Strictly to be used within masonry chimneys, as laid out by Building Regulations Document J, it is suitable for wood with under 20% moisture, smokeless coal, gas, and oil appliances, enduring temperatures up to 600°C (T600 designation).
Note that this joiner must not be used on gas liners and is recommended solely for chimney liner extensions exceeding standard flex lengths. For optimal performance, annual or biannual sweeping by a HETAS-registered professional is strongly advised. Avoid chemical cleaners and mild steel tools to extend the lifespan of your stainless steel chimney system.
SKU: 20-100-J
Technical Specifications
SKU
20-100-J
Designation
BSEN 1856-2 T600 N1 W V2 L50012 G
System
MI-FLEX Accessories MF20
Material
316L Stainless Steel
Colour Finish
Natural / Stainless Steel
Compatible Fuels
Wood (under 20% moisture), Smokeless Coal, Oil, Gas
Approvals
HETAS / CE
Maximum Temperature
600°C (T600)
• Ensure the joiner is used exclusively within masonry chimneys as per Building Regulations Document J.
• It is designed solely for joining MI-FLEX 316 and 904 flexible flue liners and must not be used with gas liners.
• Install the joiner only when the chimney liner length exceeds the standard flex options; this accessory is essential for creating continuous flue systems.
• For assembly, ensure the liner sections are clean and free from debris before connecting with the joiner.
• Engage a HETAS-registered professional for both installation and regular sweeping to ensure optimum performance.
• Avoid using chemical cleaners and mild steel tools during installation and maintenance to preserve the integrity of the stainless steel.
The Joiner - Ø 100 is compatible with MI-FLEX 316 and 904 flexible flue liners.
No, the Joiner - Ø 100 is not suitable for gas liners. It is designed only for multi-fuel flexible flue liners.
This joiner is suitable for wood with less than 20% moisture, smokeless coal, gas, and oil.
The joiner can handle temperatures up to 600°C (T600 designation).
Yes, according to Building Regulations Document J, the flexible flue liner must be completely enclosed inside a masonry chimney.
It is recommended that chimneys for solid fuel appliances be swept at least twice a year – at the end of the heating season and before the start of the next one.
Maintenance and sweeping should be carried out by a competent person, preferably a HETAS-registered professional.
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 Joiner - Ø 100 is a critical accessory for anyone looking to extend the length of their multi-fuel flexible flue liners. Created with precision and engineered for durability, this joiner by National Flues is designed to meet the exacting standards of both domestic and trade customers. Whether you are installing a new chimney system or extending an existing one, understanding the benefits and correct application of this accessory is essential for ensuring safety and efficiency.
Key Features and Benefits
Durable Construction: Crafted from high-grade 316L stainless steel, the Joiner - Ø 100 offers exceptional durability and corrosion resistance. This ensures that it stands up to harsh conditions and delivers long-lasting performance.
Temperature Resilience: With a maximum temperature rating of 600°C, this joiner is perfect for use in high-temperature environments. The T600 designation confirms its ability to handle the intense conditions found within masonry chimneys.
Multi-Fuel Compatibility: The accessory is specifically designed for use with a variety of fuels including wood (with less than 20% moisture), smokeless coal, oil, and gas. This versatility makes it suitable for diverse residential heating applications.
Regulatory Compliance: Fully compliant with HETAS and CE standards, the Joiner - Ø 100 is a safe and reliable component. It is designed to meet all applicable UK building regulations, thereby providing peace of mind to homeowners and builders alike.
Installation Guidance
Installing the Joiner - Ø 100 is straightforward when following the proper guidelines. It is intended exclusively for use within masonry chimneys and must only be used with MI-FLEX 316 and 904 flue liners. Before installation, ensure that all components of your chimney system are clean and free from any blockages. It is highly recommended that a HETAS-registered professional conducts both the installation and subsequent maintenance. When installing, carefully follow the instructions provided in the technical specifications. Ensure a secure, leak-proof connection between the liner sections for optimal performance and safety.
Maintenance and Safety Considerations
Regular maintenance is key to the effective operation of your chimney system. Annual or biannual sweeping by a qualified professional is recommended to remove any buildup and ensure that your system operates safely. Avoid using chemical cleaners or mild steel tools, as these can compromise the integrity of the stainless steel. Regular inspections will help to identify any potential issues early, ensuring that your system remains efficient and safe over the long term. The Joiner - Ø 100 plays a vital role in maintaining the structural integrity of your chimney system and should be checked periodically along with the entire flue assembly.
Addressing Common Objections
Concerns about Durability: Some customers might worry about the longevity of chimney accessories. The 316L stainless steel construction of the Joiner - Ø 100 guarantees durability even under demanding conditions. It is engineered to withstand not only high temperatures but also the corrosive effects of flue gases.
Installation Complexity: For those hesitant about installing a new accessory in their chimney system, it is important to note that the Joiner - Ø 100 is designed for easy integration with existing MI-FLEX liners. Professional installation ensures that the process is smooth and hassle-free.
Maintenance Challenges: Regular cleaning and maintenance can seem like a chore, however, the robust design of this joiner minimises wear and tear. Coupled with professional servicing, you can be confident that your chimney system remains in top condition throughout its service life.
Advantages over Other Systems
When compared to alternative solutions, the Joiner - Ø 100 stands out for its design and compatibility. Its specific design for MI-FLEX systems ensures a perfect fit and a secure join, reducing the likelihood of leaks or structural issues. The build quality and ease of maintenance further add to its advantages, making it the accessory of choice for multi-fuel chimneys.
Optional Accessories
In addition to the Joiner - Ø 100, National Flues offers a range of optional accessories designed to complement and enhance your chimney system. From supplementary joiners to additional liner support components, exploring these options can help you achieve a fully optimised installation tailored to your specific needs. We encourage you to review our full range of accessories to find additional products that can extend the functionality and safety of your chimney system.
Final Thoughts
The Joiner - Ø 100 is a premium product that delivers exceptional performance, ensuring that your multi-fuel chimney system operates safely and efficiently. Its durable construction, high temperature resistance, and regulatory compliance make it a must-have component for any serious chimney installation. Whether you are a homeowner or a trade professional, understanding the benefits and proper use of this accessory is key to achieving a successful, long-lasting installation.
Make every part of your chimney system count by choosing quality, reliability, and compliance. The Joiner - Ø 100 is not just an accessory; it is a critical investment in your home’s safety and efficiency. With National Flues, you benefit from a legacy of quality and expertise that ensures your installation meets the highest standards. For detailed guidance on installation and maintenance, our team of experts is always on hand to assist you with any queries or support you might need.
Buy now or call 01670 206 999.
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