TWPro MB - Twin Wall to Twin Wall Increaser - Ø 150-175mm (37-150-004)
What it’s for
Full features & benefits
- HETAS & CE approvals guarantee compliance with high safety standards, providing peace of mind for homeowners and installers alike.
- The robust 304 stainless steel outer skin with a high-temperature black finish not only looks professional but also resists corrosion and damage from harsh elements.
- The 316L stainless steel inner skin ensures prolonged service life, even under extreme operating temperatures up to 600°C.
- Fully welded construction means fewer weak points, resulting in a reliable system that maintains its integrity over time.
- The efficient flue size transition from 150mm to 175mm offers flexibility for connecting various heating appliances, ensuring a proper fit and improved performance.
- Dense rockwool insulation at 200kg/m³ guarantees excellent thermal retention while providing additional safety by maintaining required clearances.
- The supplied locking band allows for a straightforward, secure installation process, minimising downtime and installation errors.
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Fast deliveryMonday, November 17th*
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Best PriceCall us to beat any price you found online.
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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
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.
Have Questions?
Phone: 01670 206999
Email: sales@nationalflues.com
- Details
- Specs
- Install/Packs
- FAQs
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
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.
This is us — real advice over the phone, or at the counter, and real stock in our warehouse.
| 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/m³ |
| 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 600°C |