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National Flues presents the TWPro MB Twin Wall to Twin Wall Increaser, a premium chimney accessory engineered to provide a seamless transition from 150mm to 175mm. Specifically designed for solid fuel, gas, and oil appliances, this increaser is constructed with high-quality stainless steel and offers unmatched durability and safety compliance under HETAS and CE standards.
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£77.49
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At a Glance
HETAS approved & CE marked
Compatible with a range of solid fuel, gas, and oil appliances
Durable construction with 304 stainless steel outer skin and 316L stainless steel inner skin
Fully welded for enhanced stability and longevity
Efficiently transitions flue sizes from 150mm to 175mm
Insulated with dense compressed rockwool at 200kg/m³
Quick installation with a supplied locking band
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Please Note: All dimensions refer to the internal diameter of flues.
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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 TWPro MB - Twin Wall to Twin Wall Increaser - Ø 150-175mm is engineered for enhancing chimney flue systems for solid fuel and gas/oil appliances. It excels in connecting various types of stoves and boilers such as wood stoves, gas coal effect fires, oil boilers, and any solid fuel appliances that require a robust flue system. Constructed with a 304 stainless steel outer skin with a high-temperature black finish and a 316 grade stainless steel inner skin, this increaser ensures longevity and efficiency.
Measuring 0.4mm in thickness, both skins are insulated with a dense compressed rockwool at 200kg/m³. The entire assembly is fully welded to guarantee sturdiness and reliability. For safety, it maintains a 50mm distance from combustible materials such as wood and plasterboard.
The TWPro MB module boasts HETAS approval and CE marking, attesting to its high quality and safety standards. Users can secure all parts easily using a supplied locking band, ensuring quick and efficient installation. Key compliance designations are EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 P1 W V2 L50040 O20, marking its suitability for up to 600°C.
SKU: 37-150-004
Technical Specifications
Model
TWPro MB
Flue Size
150-175mm
Outer Material
304 Stainless Steel, 0.4mm thick, High Temperature Black Coated
Inner Material
316L Stainless Steel, 0.4mm thick
Insulation
Dense compressed rockwool at 200kg/mu00b3
Compliance
EN1856-1 T600 N1 W V2 L50040 G50, EN1856-1 T200 P1 W V2 L50040 O20
Approval
HETAS / CE
Installation
Supplied locking band; maintain 50mm clearance from combustibles
Compatible Fuels
Wood, Oil, Gas, Low sulphur coal
Operating Temperature
Up to 600u00b0C
Ensure proper clearance of 50mm from combustible materials during installation. Follow the provided instructions to secure all segments using the supplied locking band, and double-check that all fittings are tight and secure. Use appropriate tools for assembly and refer to the detailed installation manual included with the product for guidance. It is essential to adhere to local building regulations and manufacturer guidelines to ensure a safe and compliant installation.
The TWPro MB is suitable for solid fuel appliances, gas/stoves, oil boilers, and gas boilers.
Yes, the TWPro MB is HETAS approved and CE marked, ensuring high safety and quality standards.
The outer skin is made from 304 stainless steel with a high-temperature black finish, while the inner skin is from 316 grade stainless steel. Both skins are 0.4mm thick.
It uses compressed rockwool insulation with a density of 200kg/m³, providing excellent heat retention and safety.
Installation is straightforward with parts secured using a supplied locking band. Ensure a 50mm distance from combustible materials during installation.
This increaser adapts the flue size from 150mm to 175mm, providing greater flexibility and improved fit with various chimney systems.
The TWPro MB carries designations EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 P1 W V2 L50040 O20, indicating its suitability for temperatures of up to 600°C.
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.
Read our review in our TWPro MB - Twin Wall to Twin Wall Increaser - Ø 150-175mm buyers guide
Introduction
The TWPro MB Twin Wall to Twin Wall Increaser by National Flues is a versatile and robust solution for adapting your chimney flue from 150mm to 175mm. This increaser is specifically engineered to work with a variety of appliances including wood stoves, oil boilers, gas appliances, and more. With its high-quality construction and adherence to strict safety standards, this product ensures a reliable and efficient performance over its long service life.
Key Features and Benefits
HETAS & CE Certification: One of the most significant advantages of the TWPro MB is its HETAS approval and CE marking. These certifications are a testament to the product’s compliance with stringent safety and quality standards. Whether you are a homeowner or a professional installer, these marks provide confidence in the product’s performance.
Superior Materials: The outer skin is manufactured from 304-grade stainless steel with a high-temperature black finish, while the inner skin is made from high-quality 316L stainless steel. Both skins are 0.4mm thick and are insulated with dense compressed rockwool, ensuring excellent heat retention and durability even in extreme conditions.
Fully Welded Construction: Every joint in the TWPro MB is fully welded, reducing the risk of leaks or structural weaknesses. This design ensures that your flue system remains robust over time, even under the high thermal stresses associated with continuous use.
Flexible and Efficient Design: The increaser is designed to smoothly adapt a flue size from 150mm to 175mm, providing versatility in the installation of various heating appliances. This flexibility means that you can integrate different types of appliances with ease, ensuring a perfect fit and optimal performance.
Installation Guidelines
Proper installation is key to harnessing the full benefits of the TWPro MB. The installation process is straightforward thanks to the supplied locking band, which makes assembly quick and secure. However, it is critical to maintain a minimum clearance of 50mm from combustible materials such as wood, plasterboard, and insulation. This safety measure is essential not only for compliance with building regulations but also for the longevity of the system.
Step-by-step Installation Tips:
• Always begin by reading the complete installation manual provided with the product.
• Verify that all components are present and undamaged before starting the installation.
• Use the supplied locking band to restrict movement between segments, thereby ensuring a secure connection.
• Double-check clearances to maintain a safe distance from combustible materials.
Compatibility and Applications
The TWPro MB is compatible with a broad spectrum of heating appliances. Its design accommodates wood stoves, gas and oil boilers, and even modern gas coal effect fires. This wide range of compatibility makes the increaser a highly adaptable option for both new installations and upgrades to existing chimney systems. Its robust construction ensures that it can handle the thermal demands of high-performance appliances, providing a stable and efficient conduit for exhaust gases.
Optional Accessories and Enhancements
While the TWPro MB is designed as a standalone solution, National Flues offers a range of optional accessories that can further improve the performance and longevity of your flue system. These accessories include additional sealing components, custom mounting brackets, and enhanced insulation kits. Customers are encouraged to browse the accessory options available on our website to tailor the system to their specific needs.
Frequently Asked Questions
Q: What types of appliances can be connected with the TWPro MB?
A: The increaser is suitable for solid fuel appliances, gas stoves, oil boilers, and other similar heating systems.
Q: How durable is this product?
A: With a fully welded construction and premium stainless steel materials, the TWPro MB is designed to withstand high temperatures and harsh conditions over a long period.
Q: Is the installation process user-friendly?
A: Yes, the product comes with a locking band for easy assembly, and the comprehensive installation manual provides step-by-step instructions.
Maintenance and Longevity
Routine maintenance of your flue system is essential for ensuring that it operates at peak efficiency. The TWPro MB is designed for minimal upkeep; however, regular inspections are recommended to check for any signs of wear or damage. Ensure that any optional accessories are also maintained according to their respective guidelines, and always follow local safety regulations when conducting maintenance work.
Final Thoughts
With its advanced engineering, top-quality materials, and adherence to rigorous safety standards, the TWPro MB Twin Wall to Twin Wall Increaser is an excellent choice for upgrading your chimney system. Its ability to efficiently transition between flue sizes makes it a versatile and valuable addition to any heating appliance installation. Whether you are upgrading an existing system or installing a new one, the TWPro MB stands out as a product that combines reliability, efficiency, and ease of installation.
For those seeking enhanced performance and safety, exploring optional accessories can further optimise the system and ensure a tailored fit for your specific requirements. With a wealth of features designed to meet the demands of modern heating applications, the TWPro MB is sure to provide long-term satisfaction for both retail and trade customers.
Buy now or call 01670 206 999.
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