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National Flues proudly presents the TWPro MB - Twin Wall to Twin Wall Increaser (Ø 125-150mm), a premium chimney adapter designed for both solid fuel and gas/oil appliances. This high-performance conversion device is engineered to upgrade your existing flue system while ensuring safety and efficiency. Perfect for woodstoves, oil boilers, and gas coal effect fires, the TWPro MB offers a seamless integration into any heating setup, making it the ideal choice for those seeking reliable and cost-effective chimney solutions.
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In Stock
£64.99
Give us a call if you find it cheaper and we'll try to price match.
At a Glance
Compatible with solid fuel and gas/oil appliances
Robust construction with dual stainless steel layers
High temperature black coated outer skin
Compressed rockwool insulation (200kg/m3) for efficient heat retention
HETAS approved and CE marked for safety
Maintains a safe 50mm clearance from combustibles
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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 TWPro MB - Twin Wall to Twin Wall Increaser (Ø 125-150mm) is a versatile component designed for solid fuel and gas/oil appliances including woodstoves, gas coal effect fires, oil boilers, and gas boilers. Constructed with an outer skin of 304 stainless steel and an inner skin of 316 stainless steel, both 0.4mm thick, this increaser guarantees durability and superior performance. The high temperature black finish on the outer skin not only enhances its aesthetic appeal but also provides robust protection against heat.
The insulation is made of compressed rockwool with a density of 200kg/m3, ensuring efficient heat retention. Fully welded for robustness, this increaser mandates a safe distance of 50mm from combustible materials such as wood and plasterboard. Proudly carrying HETAS approval and CE marking, it adheres to EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 P1 W V2 L50040 O20 standards.
Installation is straightforward, requiring the use of a Locking Band to secure the parts together, ensuring a hassle-free setup.
SKU: 37-125-004
Technical Specifications
SKU
37-125-004
Size
125mm to 150mm
Inner Material
316L Stainless Steel - 0.40mm thick
Outer Material
304 Stainless Steel - 0.40mm thick with high temperature black coating
Insulation
Compressed Rockwool (200kg/m3)
Approvals
HETAS / CE
Clearance
50mm from combustible materials
Designation
EN1856-1 T600 N1 W V2 L50040 G50 / EN1856-1 T200 P1 W V2 L50040 O20
System
TWPro Black
Applications
Woodstoves, gas coal effect fires, oil boilers, gas boilers
The TWPro MB increaser installation is straightforward and secure. Ensure that you follow these key steps:
• Maintain a minimum 50mm clearance from any combustible materials such as wood or plasterboard.
• Use the provided Locking Band to securely join the parts of the increaser for a robust and safe setup.
• Always check that the increaser is correctly aligned with the twin wall flue system to avoid any gaps or misalignments that could compromise safety or performance.
• If you are uncertain about the installation process, consult a professional installer to guarantee compliance with local safety standards.
The TWPro MB Increaser is compatible with solid fuel appliances like woodstoves, gas coal effect fires, oil boilers, and gas boilers.
The increaser features an outer skin made from 304 stainless steel and an inner skin from 316 stainless steel, both 0.4mm thick. It's also coated with a high temperature black finish and insulated with compressed rockwool.
The increaser should be kept at a distance of at least 50mm from any combustible materials like wood or plasterboard.
Yes, the TWPro MB Increaser is HETAS approved and also CE marked.
The increaser is installed using a Locking Band that secures the parts together. Ensure you maintain the recommended 50mm distance from combustibles.
The designation numbers for this increaser are EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 P1 W V2 L50040 O20.
The insulation of the TWPro MB Increaser has a density of 200kg/m3, which ensures efficient heat retention.
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 125-150mm buyers guide
TWPro MB Increaser Buyers Guide
The TWPro MB - Twin Wall to Twin Wall Increaser (Ø 125-150mm) is an essential upgrade for your flue system, especially if you are looking to convert or extend your chimney for various solid fuel and gas/oil appliances. In this detailed buyers guide, we will explore all aspects of the product, address common concerns, and provide a comprehensive overview to help you make an informed decision.
Product Overview
Designed with precision and performance in mind, the TWPro MB increaser offers a high-quality solution for increasing the diameter of your flue system. Manufactured using a dual-layered stainless steel construction, it features an inner layer of 316L stainless steel and an outer layer of 304 stainless steel, both 0.4mm thick. This robust design, combined with a high temperature black coated finish, not only ensures durability but also elevates the aesthetic appeal of your installation. The inclusion of compressed rockwool insulation (200kg/m3) enhances heat retention and efficiency.
Key Features and Benefits
Durability and Safety
• The dual stainless steel layers provide excellent resistance to heat and corrosion, ensuring a long lifespan for your flue system.
• HETAS approval and CE marking guarantee that the product complies with stringent UK safety and quality standards.
Enhanced Efficiency
• Compressed rockwool insulation optimises heat retention, reducing energy loss and improving the overall efficiency of your heating system.
• The increaser supports a wide range of appliances, including woodstoves, oil boilers, and gas coal effect fires, making it a versatile addition to your setup.
Safety Clearances
• A mandatory 50mm clearance from combustible materials is crucial for safe operation. This guideline protects your property while allowing the system to perform optimally.
Installation Process
Installing the TWPro MB increaser is designed to be as straightforward as possible. However, adherence to safety protocols is paramount:
1. Preparation: Ensure that you have all the necessary components, including the Locking Band required for securing the increaser. Verify that the installation area meets the clearance requirement of 50mm from any combustible surfaces.
2. Assembly: Carefully align the increaser with your existing twin wall system. The fully welded design minimizes any risk of misalignment. Use the Locking Band to fix the connection, ensuring a secure and robust setup.
3. Inspection: After installation, inspect the system thoroughly. Check that there are no loose connections and that the clearance guidelines are strictly followed. If in doubt, consult a certified installer.
FAQs and Common Objections
Q: Is this increaser suitable for all types of solid fuel and gas/oil appliances?
A: Yes, the TWPro MB increaser is compatible with a wide variety of appliances including woodstoves, oil boilers, and gas coal effect fires.
Q: Can I install the increaser myself or should I hire a professional?
A: While the installation is straightforward, we recommend that if you are unfamiliar with chimney installations, you seek professional assistance to ensure absolute safety and compliance with local regulations.
Q: How do I maintain the quality of the increaser?
A: Regular inspections and adherence to the 50mm clearance rule will help maintain optimal performance. Additionally, the high-quality stainless steel construction is designed to withstand long-term use with minimal maintenance.
Why Choose National Flues?
National Flues is a trusted supplier of premium chimney and flue products in the UK. Our TWPro MB increaser is one of many products that underline our commitment to quality and safety. We ensure that every component we offer meets rigorous industry standards, giving you peace of mind when it comes to both performance and safety. With a focus on delivering exceptional customer service, we cater to both retail and trade customers nationwide.
Final Thoughts
If you are looking to upgrade your flue system, the TWPro MB - Twin Wall to Twin Wall Increaser (Ø 125-150mm) stands out as a smart, efficient, and safe solution. Its robust construction, superior insulation, and compliance with UK safety standards make it an indispensable component for modern heating systems. Whether you are a homeowner or a professional installer, investing in the TWPro MB increaser means choosing a product that combines high performance with lasting durability.
This guide has covered all the crucial aspects you need to know about the TWPro MB increaser, from its materials and manufacturing quality to installation tips and safety practices. The advantages of this product are clear: enhanced heat retention, robust construction, and adherence to strict safety guidelines, all of which contribute to a more efficient and secure heating system.
For those who value long-term reliability and performance in a flue system upgrade, the TWPro MB increaser is the ideal choice. It simplifies the conversion process while ensuring that you do not compromise on safety or efficiency. Enjoy peace of mind knowing that your heating system is built with quality components that stand the test of time. With National Flues, your investment in a better heating system is backed by expert support and comprehensive service.
Buy now or call 01670 206 999.
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