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National Flues presents the Non-concentric Increaser 3 Diameters - Ø 400, a vital component in modern flue systems. This premium flue adaptor is engineered from 316L stainless steel and designed to integrate seamlessly into both residential and commercial chimney installations. Capable of handling both gas and oil applications, this versatile component ensures optimal performance, safety, and efficiency. Whether you are upgrading an existing system or planning a new installation, our product meets stringent EN 1856-1 standards and is CE marked, making it a trusted choice among professionals.
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£550.49
with free delivery
Give us a call if you find it cheaper and we'll try to price match.
At a Glance
Constructed from high-grade 316L stainless steel for durability and corrosion resistance
Modular push-fit joint secured with a locking band for reliable, simple installation
CE marked and compliant with EN 1856-1 standards, ensuring high safety and performance
Designed to prevent condensate pooling in inclined flue systems
Suitable for a variety of high and low temperature applications including boilers, ovens, and ventilation systems
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Please Note: All dimensions refer to the internal diameter of flues.
If unsure, please call 01670 206999 to ensure you choose the correct products.
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 Non-concentric increaser 3 diameters - Ø 400 from National Flues is a top-of-the-line component designed for a wide range of high and low temperature applications. Made of durable 316L stainless steel, this modular flue system is perfect for boilers, ovens, ventilation systems, and chimney shaft liners. With a high-pressure sealing gasket P1/H1, it offers reliable performance in both non-condensing and condensing environments.
The SWPro system is CE marked and complies with EN 1856-1 standards, ensuring safety and efficiency. It features a push-fit jointing system secured with a locking band, making installation straightforward. Keep a distance of 50mm from any combustible materials for maximum safety.
SKU: 3-400-204
Technical Specifications
Material
316L Stainless Steel
Max Diameter
Ø 400
Fire Safety Distance
50mm
CE Marking
Yes
Pressure Rating
High-Pressure Gasket P1/H1
Compliance
EN 1856-1
Warranty
10 Years
System
SWPro
Suitable For
Gas, Oil applications
• Ensure the flue system is thoroughly inspected for any debris or damage before installation.
• Maintain the required 50mm distance from any combustible materials as a critical safety measure.
• Use the push-fit jointing system along with sealing gaskets at every connection point to create a secure, leak-proof assembly.
• Secure the joints with the locking band, ensuring that the increaser is properly fixed in place.
• Follow the manufacturer’s guidelines closely to guarantee compliance with safety standards; professional installation is recommended if uncertain.
The Non-concentric Increaser is made from high-grade 316L stainless steel, ensuring long-lasting durability and resistance to corrosion.
This increaser is suitable for boilers, ovens, ventilation systems, and chimney shaft liners in both high and low-temperature environments.
Yes, the SWPro system, including this increaser, is CE marked and complies with EN 1856-1 standards.
The increaser features a modular push-fit jointing system secured with a locking band. Make sure to fit jointing gaskets on every joint in P1 and H1 installations and maintain a distance of 50mm from any combustible materials.
Yes, the Non-concentric Increaser is designed to handle both positive and negative pressure environments effectively.
The high-pressure sealing gasket ensures a secure and leak-proof connection, making the system suitable for non-condensing and condensing applications.
Yes, National Flues provides reliable nationwide delivery for all our products, ensuring you receive your order promptly whether you're a retail or trade customer.
Delivery Information +
We work relentlessly to ensure you get your order fast.
Estimated delivery for this product is Thursday, May 1st. 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.
Your Comprehensive Guide to the Non-concentric Increaser 3 Diameters - Ø 400
When planning a chimney, flue, or ventilation system upgrade, selecting the right components is paramount. The Non-concentric Increaser 3 Diameters - Ø 400 from National Flues is designed with both durability and performance in mind, making it an essential addition to your installation. In this guide, we cover everything you need to know – from the technical details to installation steps – to help you make an informed decision.
Overview
The Non-concentric Increaser is specifically engineered to expand the diameter of your flue system in inclined runs. This helps to prevent condensate pooling, a common issue in systems where the flue runs are not perfectly vertical. Crafted from robust 316L stainless steel, the increaser is designed to withstand both high and low temperature applications, whether you're dealing with boilers, ovens, or complex ventilation systems.
Key Benefits
Durability and Reliability: The use of high-quality 316L stainless steel ensures that this increaser is built to last. Unlike other materials that may corrode or weaken over time, 316L stainless steel offers long-lasting performance even in harsh conditions. This results in fewer maintenance issues and lower long-term costs.
Ease of Installation: Featuring a modular push-fit joint system, the device is easy to install. The integrated locking band ensures the connections are secure and leak-proof, minimising installation errors and the need for rework. Even those with moderate DIY skills can achieve a professional-standard installation with this system.
Safety and Compliance: Safety is paramount with National Flues. This product complies with the EN 1856-1 standards and is CE marked, reflecting its adherence to strict European safety protocols. The high-pressure sealing gasket (P1/H1) is engineered to provide a secure fit in both condensing and non-condensing conditions – an assurance that your heating system will operate efficiently and safely.
Addressing Common Concerns
What if I’m not a professional installer?
Our design prioritises ease of use. The push-fit system is intuitive, and detailed installation instructions are provided to guide you every step of the way. If you have any doubts or face unique installation challenges, our professional support team is available to offer advice and ensure your installation is up to standard.
Will this component work with my existing system?
The Non-concentric Increaser is versatile enough to be integrated into a wide range of flue systems. It is particularly effective in systems where a change in diameter is necessary to avoid condensate issues. Please ensure that the rest of your system complies with local standards and requirements to maximise efficiency.
How does it improve performance?
By increasing the flue system’s diameter, this increaser reduces the risk of condensate pooling, which can lead to inefficient draft and potential safety hazards. A more effective draft not only improves system performance but also extends the life of your heating appliance by ensuring optimal exhaust flow.
Technical Considerations
The technical specifications of the Non-concentric Increaser are designed to meet the demands of both commercial and residential installations. The appliance is built from 316L stainless steel, which is renowned for its ability to resist corrosion and withstand high temperatures. The unit’s compliance with EN 1856-1 and CE marking means it adheres to industry-leading safety standards, providing you with confidence in your installation.
Installation Best Practices
When installing the increaser, remember the following steps:
• Always inspect the installation site and verify that the surrounding area is free from combustible materials, maintaining at least a 50mm gap.
• Assemble the system using the push-fit joints and secure these with the locking band to ensure all components are tightly sealed.
• Place sealing gaskets at every connection point to prevent leaks and maintain the integrity of the system under both positive and negative pressure conditions.
• Consider having a professional assess the installation if you are uncertain about any steps in the process.
Final Thoughts
The Non-concentric Increaser 3 Diameters - Ø 400 stands as a premium solution for enhancing the efficiency and safety of your flue system. Its robust construction, coupled with an exceptionally secure jointing system, makes it a worthwhile investment for anyone looking to optimise their installation. Whether you are updating an existing flue or constructing a new system, this increaser promises exceptional performance and long-term reliability.
With detailed installation instructions and an emphasis on safety and durability, this product is designed to address common issues such as condensate pooling and inefficient draft. Its design not only improves performance but also complies with the highest industry standards, ensuring peace of mind. National Flues is dedicated to providing quality solutions that meet your needs, reinforcing its reputation as a leader in flue and chimney technology.
This buyer’s guide has covered the essential aspects of the product, addressing technical, installation, and performance concerns while providing clear answers and actionable advice. With its robust design and industry-leading construction, the Non-concentric Increaser 3 Diameters - Ø 400 is an investment you can rely on.
Add this vital component to your system to enhance its performance and longevity. Buy now or call 01670 206 999.
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