Single Wall to Twin Wall Increaser Ø 100 - Ø 125 (2-100-002)
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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
- Tapered design for a smooth transition from single to twin wall systems
- Outer skin of 304 grade stainless steel and inner skin of 316 grade stainless steel for durability
- 4mm material thickness providing optimal balance of strength and thermal efficiency
- Insulated with high-density compressed rockwool (200kg/m3) for maximum heat retention
- Fully welded construction ensuring robust performance and safety (HETAS Approved and CE marked)
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 Single Wall to Twin Wall Increaser Ø 100 - Ø 125 is a versatile and essential component in your chimney system, suitable for use with both solid fuel and gas/oil appliances like woodstoves, gas coal effect fires, and boilers. Constructed with high-quality materials, the outer skin is made from 304 grade stainless steel and the inner skin from 316 grade stainless steel, both at 0.4mm thickness. The insulation comprises compressed rockwool with a density of 200kg/m3, ensuring maximum thermal efficiency and safety.
The increaser is fully welded for durability and stability, with an essential 50mm distance from combustibles. HETAS Approved and CE marked, it follows strict standards ensuring premium performance and safety. Installation is made simple with the use of a Locking Band, designed for seamless transitions from single to twin wall configurations.
SKU: 2-100-002
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.
This is us — real advice over the phone, or at the counter, and real stock in our warehouse.
| Technical Specifications | |
|---|---|
| SKU | 2-100-002 |
| Item | Single Wall to Twin Wall Increaser Ø 100 - Ø 125 |
| Designations | EN1856-1 T600 N1 W V2 L50040 G50 / EN1856-1 T200 P1 W V2 L50040 020 |
| System | TWPro |
| Materials | 316L Stainless Steel (0.40mm thick), 304 Stainless Steel (0.40mm thick) |
| Insulation | Compressed rockwool (density 200kg/m3) |
| Fuels Compatible | Wood, Oil, Gas, Low sulphur coal |
| Approvals | HETAS / CE |
| Distance To Combustibles | 50mm |