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Screw-FIX Increaser - Ø 80-100mm (25-80-MR)
National Flues presents the Screw-FIX Increaser - Ø 80-100mm, a high-quality flue adaptor designed for safe and secure transitions between rigid single wall systems and MI-FLEX flexible liners. Constructed from premium 316L stainless steel, this product guarantees durability, compliance with Building Regulations, and versatility for wood, oil, gas, and smokeless coal applications.
In Stock
£30.99
Give us a call if you find it cheaper and we'll try to price match.
At a Glance
0.6mm 316 stainless steel construction for exceptional durability Compatible connection between rigid single wall and MI-FLEX flexible flue liners Compliant with Building Regulations Document J for safe installations Versatile use with wood, oil, gas, and smokeless coal appliances Simple and reliable installation secured with fire cement, ceramic rope, or high-temperature sealant
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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.
Introducing the Screw-FIX Increaser - Ø 80-100mm, a premium 0.6mm 316 stainless steel adaptor designed for seamless transitions between a rigid single wall flue system and MI-FLEX flexible flue liners. This increaser plays a vital role in establishing a secure, gas-tight connection and complies with Building Regulations Document J, ensuring the flue liner is fully enclosed within a masonry chimney. Suitable for appliances operating up to 600°C (T600 designation), it's versatile for use with wood (moisture <20%), smokeless coal, gas, and oil.
Essential in creating a full chimney system, the Screw-FIX Increaser incorporates fire cement, ceramic rope, or high-temperature sealant for optimal performance. Maintenance is straightforward: simply ensure regular chimney sweeping by a competent person, ideally twice a year for solid fuel applications to avoid blockages and deposits.
SKU: 25-80-MR
Technical Specifications
Material
316L Stainless Steel
Design
0.6mm stainless steel adaptor
Size
u00d880-100mm
Temperature Rating
Up to 600u00b0C (T600 designation)
Fuel Compatibility
Wood (<20% moisture), Smokeless Coal, Gas, Oil
Compliance
Building Regulations Document J, CE / HETAS
Ensure the correct use of fire cement, ceramic rope, or high-temperature sealant to secure a gas-tight connection when installing this increaser. Position it to ensure the complete enclosure of your MI-FLEX flue liner within the masonry chimney. Regular chimney inspections and cleaning are essential; for solid fuel applications, servicing should occur at least twice a year by a HETAS registered professional to prevent blockages and buildup.
The Screw-FIX Increaser is crafted from high-quality 0.6mm 316 stainless steel, ensuring durability and strength.
Yes, it is suitable for wood (with less than 20% moisture), smokeless coal, gas, and oil appliances.
Absolutely, it complies with Building Regulations Document J, which mandates that the flexible flue liner must be fully enclosed within a masonry chimney.
It is recommended to use fire cement, ceramic rope, or high-temperature sealant to ensure a gas-tight seal.
The Screw-FIX Increaser is rated for use with appliances that operate up to 600°C (T600 designation).
Chimney systems should be inspected and cleaned at least once a year. For those using solid fuels, sweeping should ideally occur twice a year to ensure there are no blockages or deposits.
Sweeping should be performed by a competent person. For solid fuel applications, a list of HETAS registered sweeps is available 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.
When it comes to ensuring the safety and efficiency of your chimney system, every component counts. The Screw-FIX Increaser - Ø 80-100mm is a critical part of your flue setup, acting as the link between a rigid single wall flue system and a MI-FLEX flexible flue liner. This adaptor, designed for high performance and compliance, provides a secure, gas-tight connection crucial to maintaining the integrity of your flue system.
Understanding the Screw-FIX Increaser
The Screw-FIX Increaser is crafted from robust 0.6mm 316L stainless steel, ensuring that it can withstand high operational temperatures up to 600°C. Manufactured to meet stringent safety specifications, it is fully compliant with Building Regulations Document J. This product is not only engineered for safety but also for longevity, making it an ideal choice for a variety of fuels including wood (with less than 20% moisture), oil, gas, and smokeless coal. Its stainless steel construction ensures resistance to corrosion and heat, which is imperative for the extended lifespan of your chimney system.
Installation and Maintenance
Simple Installation
Installing the Screw-FIX Increaser is straightforward. The key to effective installation is ensuring that the connection between the rigid flue and the MI-FLEX liner is secure and gas-tight. This is achieved by using high-temperature sealants such as fire cement, ceramic rope, or specialised high-temperature sealants. A correct installation guarantees that the full chimney system is optimally enclosed within a masonry structure, reducing any potential safety risks.
Maintenance Tips
Regular maintenance is critical to the performance of your flue system. It is advisable to have your chimney inspected and, when applicable, swept at least once a year. For systems using solid fuels, a bi-annual check is recommended. Engaging a competent and HETAS registered professional ensures that your system remains free of blockages and deposit build-up, maximising operational safety and efficiency.
Compliance and Safety
One of the standout features of the Screw-FIX Increaser is its adherence to Building Regulations Document J. This compliance is imperative for any chimney system installation, ensuring that all safety guidelines are met. The product’s design, which facilitates a complete and gas-tight flue connection, makes it an essential component in preventing potential hazards linked to poor ventilation and sub-standard installations. The regulatory approval also eases the process during property inspections and when obtaining insurance.
Why Choose National Flues
National Flues has established itself as a premier supplier for both retail and trade customers across the UK. With a commitment to competitive pricing and reliable delivery, our products, including the Screw-FIX Increaser, are engineered to provide enhanced performance while meeting all necessary safety standards. Our focus on quality and customer satisfaction ensures that you receive not only a high-performance product but also expert support throughout your purchase and installation process. The product is backed by detailed documentation, helpful installation guidelines, and friendly customer support ready to assist you should any questions arise.
Customer FAQs and Considerations
Many customers often query about the versatility of the adaptor regarding different types of fuel and its long-term durability. The Screw-FIX Increaser excels in both areas by offering a secure connection suitable for multiple fuel types. Another frequently asked question concerns its compliance with safety regulations, to which the answer is a resounding yes – it is fully compliant with Building Regulations Document J, ensuring that every installation meets the highest safety standards.
In addition to performance and compliance, ease of installation is a significant factor. The design of the Screw-FIX Increaser ensures that even those with moderate DIY skills can achieve a professional result with minimal hassle. However, for optimal safety and maintenance, professional installation and regular servicing by certified personnel are highly recommended.
Final Advice
For anyone looking to upgrade, repair, or install a new flue system, the Screw-FIX Increaser offers undeniable advantages. Its robust construction, high temperature resilience, and established compliance with Building Regulations make it a sound investment in the safety and longevity of your heating system. Furthermore, its compatibility with various fuel types provides flexibility and adaptability, ensuring that it fits perfectly into a wide array of installations. When assessing the overall cost of modifying or installing a chimney system, the added reliability and safety conferred by this product more than justify its inclusion in your project.
Whether you are a homeowner, contractor, or industry professional, integrating high-quality components like the Screw-FIX Increaser is essential to deliver the best performance and safety standards. Trust National Flues to supply you with reliable, durable, and cost-effective solutions, tailored to meet the demanding needs of modern installations.
Buy now or call 01670 206 999.
Enhance your chimney system instantly – add to cart now or call 01670 206 999.
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