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National Flues presents the Increasing MI-FLEX Adaptor – Ø 125-Ø 150, a leading choice for those seeking durable and efficient MI-FLEX accessories. This high-quality 316L stainless steel adaptor provides a seamless and reliable transition between your single wall flue and MI-FLEX flue liner, ensuring a fully compliant installation that enhances both performance and safety.
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In Stock
£21.99
Give us a call if you find it cheaper and we'll try to price match.
At a Glance
Premium 316L stainless steel construction
Robust 0.6mm thickness for enhanced durability
Heat resistance rated up to 600°C (T600)
Seamless connection between single wall flue and MI-FLEX liner
Compliant with Building Regulations Document J
Versatile for wood, oil, gas, and smokeless coal appliances
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The Increasing MI-FLEX Adaptor - Ø 125-Ø 150 is a high-quality 0.6mm 316 stainless steel accessory designed for seamless transition and connection between a single wall connecting flue system and an MI-FLEX flexible flue liner. Constructed to withstand temperatures up to 600°C (T600 designation), it is suitable for use with wood (less than 20% moisture), smokeless coal, gas, and oil appliances. This adaptor is essential for forming a complete chimney system in compliance with Building Regulations Document J, requiring a fully enclosed masonry chimney.
Do not use non-masonry enclosures like timber or plasterboard. Ensuring a gas-tight seal at the bottom fixing, the connection should be secured within the masonry chimney, utilizing fire cement, ceramic rope or tape, or high-temperature sealant. Regular sweeping and maintenance by a competent person are vital, especially for solid fuel appliances.
Use only appropriate cleaning tools, avoiding chemical cleaners and mild steel tools. Recommended sweeping twice a year ensures the longevity and safety of your chimney system.
SKU: 20-125-MR
Technical Specifications
Model
20-125-MR
Material
316L Stainless Steel
Thickness
0.6mm
Heat Rating
T600 (Up to 600u00b0C)
Finish
Natural / Stainless Steel
Compatible Fuels
Wood (with less than 20% moisture), Oil, Gas, Smokeless Coal
Certifications
HETAS / CE
System
MI-FLEX Accessories MF20
Installation Method
Secured within a masonry chimney using fire cement, ceramic rope or tape, or high-temperature sealant
For a compliant and secure installation, fit the Increasing MI-FLEX Adaptor inside your masonry chimney. Secure the connection at the bottom using fire cement, ceramic rope or tape, or a high-temperature sealant to create a gas-tight seal. Ensure the adaptor is installed by a qualified professional following local building regulations. Regular chimney sweeping by a competent person is recommended—twice annually for solid fuel appliances and once a year for gas or oil—to maintain optimum performance and safety. Avoid using chemical cleaners or mild steel tools when performing maintenance on stainless steel components.
The adaptor is constructed from 0.6mm thickness 316 stainless steel, known for its durability and heat resistance.
It is suitable for use with appliances burning wood (with less than 20% moisture content), smokeless coal, gas, and oil, handling temperatures up to 600°C.
Yes, it complies with Building Regulations Document J which mandates that flexible flue liners must be enclosed within a masonry chimney.
The adaptor should be used inside a masonry chimney, secured using fire cement, ceramic rope or tape, or high-temperature sealant to create a gas-tight seal.
For chimneys serving solid fuel appliances, sweeping is recommended twice annually - post-heating season and pre-next heating season. Gas and oil lines should be inspected and cleaned at least once a year.
Avoid chemical cleaners and mild steel tools on stainless steel chimneys. Use appropriate brushes and tools to protect the integrity of the system.
For solid fuel applications, HETAS registered sweeps can be found at hetas.co.uk. Ensure sweeping and maintenance are carried out by competent persons.
Delivery Information +
We work relentlessly to ensure you get your order fast.
Estimated delivery for this product is Tuesday, April 29th.
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.
Comprehensive Buyers Guide for the Increasing MI-FLEX Adaptor - Ø 125-Ø 150
When considering a chimney system upgrade or installation, selecting the right components is essential. The Increasing MI-FLEX Adaptor, crafted from premium 316L stainless steel, is engineered to guarantee safety and optimal performance for your flue system. Below, we provide an in-depth guide to help you understand the key features, benefits, and installation considerations of this indispensable accessory.
Overview
The Increasing MI-FLEX Adaptor is designed for connecting a single wall flue system to a MI-FLEX flexible flue liner. With a 25mm increase in diameter, it ensures a secure and efficient connection that can handle high temperatures up to 600°C. This adaptor is particularly suited for applications involving wood, oil, gas, and smokeless coal appliances. Its construction not only meets but exceeds robustness requirements, making it a highly reliable product for both domestic and commercial use.
Key Benefits
Durability and Quality:
- Made from 316L stainless steel, the adaptor is highly resistant to corrosion and extreme temperatures. This material choice ensures that your chimney system remains reliable year after year.
- The 0.6mm thickness is the result of precision engineering, offering enhanced structural integrity and longevity.
Safety and Compliance:
- Rated to withstand temperatures up to 600°C, this adaptor meets the necessities of high-heat environments. The T600 designation confirms its resilience under demanding conditions.
- It complies with Building Regulations Document J, ensuring that your installation is not only safe but also meets legal standards for flue systems.
Ease of Integration:
- Designed to provide a seamless transition between different components of your chimney system, the adaptor simplifies the installation process. It bridges the gap effectively between the single wall system and the flexible MI-FLEX liner.
- The adaptor helps create a gas-tight seal when properly secured within a masonry enclosure, reducing the risk of emissions and enhancing operational efficiency.
Installation Insights
The installation of the Increasing MI-FLEX Adaptor requires careful planning and adherence to safety protocols. Here are some crucial points to consider:
Proper Securing:
- The connection must be secured within the masonry chimney using appropriate materials such as fire cement, ceramic rope or tape, or high-temperature sealant. This step is vital to prevent any gas leaks and ensure a robust connection.
Compliance with Regulations:
- It is essential to remember that Building Regulations Document J mandates the use of masonry enclosures for flexible flue liners. Avoid non-masonry enclosures like timber or plasterboard, which can compromise safety.
Maintenance and Cleaning:
- Regular maintenance is key. For solid fuel appliances, sweeping the chimney twice a year—once after the heating season and again before the next—is highly recommended. For gas and oil systems, an annual cleaning is usually sufficient.
- Always use recommended cleaning brushes and tools that do not harm stainless steel surfaces. Avoid chemical cleaners and tools made of mild steel to maintain the integrity of your chimney system.
Questions to Ask
Before proceeding with your purchase, consider these frequently asked questions:
1. What is the adaptor made of? The adaptor is constructed from 316L stainless steel ensuring strong resistance to corrosion and high temperatures.
2. Can it handle high heat? Yes, with a T600 rating, it is designed to operate safely at temperatures up to 600°C.
3. Is the adaptor compliant with current building standards? Absolutely, it meets the requirements of Building Regulations Document J, ensuring a safe and secure installation.
4. What fuels is it compatible with? The adaptor is versatile enough to work with appliances using wood (with less than 20% moisture), smokeless coal, gas, and oil.
Final Considerations
Investing in the right chimney components is crucial for maintaining a safe, efficient, and regulation-compliant heating system. The Increasing MI-FLEX Adaptor not only meets high industry standards but also provides a reliable, durable solution that simplifies your installation process. By choosing this adaptor, you are ensuring that your chimney system operates at peak performance while also enjoying peace of mind regarding safety and compliance. The use of high-quality materials guarantees longevity and reduces the need for frequent replacements, making it a cost-effective choice over time.
Before finalising your purchase, take a moment to review the compatibility of the adaptor with your current system. This product is specifically designed to work with MI-FLEX liners and single wall flue systems, and ensuring this match is essential for achieving the best performance and safety standards.
For homeowners, installers, and dedicated chimney system designers, this product provides a balance of effectiveness, safety, and ease of integration. Adopting the Increasing MI-FLEX Adaptor is an investment towards durable construction and robust performance, ensuring that your flue system remains reliable under the demanding conditions of modern heating systems.
Make an informed decision, secure your installation, and enjoy the benefits of a fully compliant and efficient chimney system that stands the test of time. Buy now or call 01670 206 999.
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