Single Wall to Twin Wall Increaser Ø 125 - Ø 150 (2-125-002)
At a Glance
- Designed for seamless connection between single wall and twin wall systems
Constructed with durable 304-grade (outer) and 316-grade (inner) stainless steel, both 0.4mm thick
Features compressed rockwool insulation (200kg/m3) for optimal thermal efficiency
Tapered design increases diameter by 25mm ensuring a smooth transition
Fully HETAS approved and CE marked for safe, compliant installations
Suitable for a variety of appliances including wood stoves, gas coal effect fires, oil and gas boilers
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Monday, June 9th. This is based on current delivery times for this product. Delivery for products not in our warehouses can be delayed because of third party carriers. If you need a stove, or other bulky product, to be delivered by a specific time in the next 7 days then please give us a call. We can sometimes 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 and you can read in our blog about they types and terms and conditions for warranties. Mi-Flex flue liner, for example, comes with a lifetime guarantee. Give us a call if you want to know about a specific warranty. 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.
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: [email protected]
- Info
- Specs
- Install
- FAQs
The Single Wall to Twin Wall Increaser Ø 125 - Ø 150 is the perfect solution for connecting various appliances to your TWPro Twin Wall Insulated Chimney system. Suitable for use with solid fuel and gas/oil appliances, such as woodstoves, gas coal effect fires, and oil and gas boilers, this increaser ensures a smooth and efficient transition. Constructed with 304-grade stainless steel for the outer skin and 316-grade stainless steel for the inner skin, both 0.4mm thick, this increaser guarantees durability and corrosion resistance.
The insulation is composed of compressed rockwool, achieving a density of 200kg/m3, providing exceptional thermal insulation. Fully welded parts ensure airtight connections, with a necessary clearance of 50mm from combustibles to enhance safety. This product meets rigorous industry standards with HETAS approval and CE marking, adhering to EN1856-1 T600 N1 W V2 L50040 G50 and EN1856-1 T200 W V2 L50040 O20 certifications.
Designed for easy installation, TWPro parts are secured with a locking band, ensuring reliable performance for all your chimney system needs.
SKU: 2-125-002
| Technical Specifications | |
|---|---|
| Model | Single Wall to Twin Wall Increaser u00d8 125 - u00d8 150 |
| Construction | Outer: 304-grade Stainless Steel (0.4mm thick), Inner: 316-grade Stainless Steel (0.4mm thick) |
| Insulation | Compressed Rockwool (200kg/m3 density) |
| Certifications | HETAS / CE (EN1856-1 T600 N1 W V2 L50040 G50, EN1856-1 T200 W V2 L50040 O20) |
| Clearance | 50mm from combustibles |
| Compatibility | Suitable for wood stoves, gas coal effect fires, oil/gas boilers |
| Design | Tapered increment increases diameter by 25mm for optimal transition |
