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TWPro MB - Single Wall to Twin Wall Increaser - Ø 150-175mm (37-150-002)

National Flues presents the TWPro MB Single Wall to Twin Wall Increaser, a premium solution tailored for superior flue connections. Engineered for a wide range of heating appliances including wood stoves, gas fires, and oil boilers, this adaptor facilitates a smooth transition between flue systems. Read more...
TWPro MB - Single Wall to Twin Wall Increaser - Ø 150-175mm
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At a Glance

  • High-quality 316L inner and 304 outer stainless steel construction
  • Fully welded, robust 0.4mm thickness for durability
  • Tapered design expands by 25mm for a seamless transition
  • HETAS approved and CE marked for safety compliance
  • Insulated with compressed rockwool (200kg/m³) ensuring a 50mm clearance from combustibles
  • Versatile for wood, gas, oil, and low sulphur coal appliances

Please Note: All dimensions refer to the internal diameter of flues. If unsure, please call 01670 206999 to ensure you choose the correct products.

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Phone: 01670 206999
Email: sales@nationalflues.com

The TWPro MB Single Wall to Twin Wall Increaser (Ø 150-175mm) is an essential component for connecting flue systems across diverse heating appliances, including wood stoves, gas coal effect fires, oil boilers, and more. Engineered for superior performance, this universal adaptor ensures a smooth transition from single wall to twin wall flue systems, expanding by 25mm with its tapered design. The outer skin, constructed from robust 304 stainless steel and finished in a high-temperature black coating, offers both durability and aesthetic appeal.

The inner skin features 316 grade stainless steel for enhanced corrosion resistance, while the 0.4mm thickness and fully welded seams guarantee longevity and reliability. Insulated with compressed rockwool at a density of 200kg/m3, it maintains a safe 50mm distance to combustible materials, ensuring secure installation. Approved by HETAS and CE marked, it meets rigorous standards of excellence with designations EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 P1 W V2 L50040 O20.

Installation is straightforward, with parts secured using a supplied locking band to maintain the necessary 50mm clearance from combustible surfaces.

SKU: 37-150-002

Delivery Information* +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Monday, November 17th. This is based on current lead times. Bear in mind that it is a busy time of year. If you need a product delivered by a specific time in the next 7 days, then please give us a call on 01670 206 999. Visit our Shipping Information page for more information.

About National Flues Ltd +

We began over 30 years ago as a fireplace shop in the North East. We now supply hundreds of trade professionals and thousands of retail customers, all across the UK, every month. We are still a family owned business, lead by the MD Neil, and always try our best to deliver the best possible experience. We also price match, so give us a call if you find this cheaper and want to buy from us. Visit our about us page to read a bit more.

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Technical Specifications
SKU37-150-002
ItemTWPro MB - Single Wall to Twin Wall Increaser - Ø 150-175mm
Designation:EN1856-1 T600 N1 W V2 L50040 G50
EN1856-1 T200 P1 W V2 L50040 020
System:TWPro Black
Inner Material:316L Stainless Steel - 0.40mm thick
Outer Material:304 Stainless Steel - 0.40mm thick - High Temperature Black Coated
Fuels:Wood, Oil, Gas, Low sulpher coal
Approvals:HETAS / CE
Distance To Combustibles:50mm
1. Before installation, ensure that the flue system components and the surrounding area meet all safety requirements, especially the necessary 50mm clearance from combustible materials. 2. Attach the TWPro MB Increaser to the existing single wall or vitreous enamel pipe and align it with the twin wall flue system. The tapered design should allow for an easy, secure fit. 3. Secure the connection using the supplied locking band, ensuring that all joints are tight and correctly positioned to prevent any movement. 4. Once installed, double-check the entire assembly to ensure that all components are firmly in place and that the required safety clearances are maintained. 5. It is advised to consult a certified installer if there is any uncertainty during the installation process. Warning: Always refer to the manufacturer’s guidelines and safety instructions before commencement.

The TWPro MB Increaser is suitable for use with solid fuel appliances such as wood stoves, gas coal effect fires, oil boilers, and gas boilers.

The increaser features an outer skin made of 304 stainless steel with a high-temperature black finish and an inner skin of 316 grade stainless steel for superior corrosion resistance. Both skins are 0.4mm thick.

Yes, the TWPro MB Increaser is HETAS approved and also CE marked.

The TWPro MB Increaser expands by 25mm, enabling a smooth transition from single wall to twin wall flue systems.

A minimum distance of 50mm should be maintained from the outside of the flue to any combustible material, such as wood or plasterboard.

Installation is simple; the TWPro Twin Wall Insulated Chimney parts are secured using a supplied locking band. Ensure a 50mm clearance from combustible materials.

The TWPro MB Increaser meets the following designations: EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 P1 W V2 L50040 O20.

 

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