Increaser 2 diameters - Ø 400 (3-400-102)
At a Glance
- Constructed from high-grade 316L stainless steel
CE marked and compliant with EN 1856-1
Versatile for both high and low temperature applications
Simple push-fit jointing system with a secure Locking Band
Suitable for positive and negative pressure flue systems
Maintains a safe 50mm clearance from combustible materials
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Friday, June 27th. 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 Increaser 2 diameters - Ø 400 from National Flues is part of the SWPro modular single wall flue system. Crafted from high-grade 316L stainless steel, it features a high-pressure sealing gasket (P1/H1). This universal increaser is versatile for both high and low temperatures, handling non-condensing and condensing applications with flue gases under positive and negative pressure.
Ideal for various uses such as boilers, ovens, and ventilation systems, this increaser also serves well as a chimney shaft liner. CE marked and conforming to EN 1856-1 standards, it ensures the highest quality and safety. Installation is a breeze with its push-fit jointing system secured by a Locking Band, and joint gaskets are a must for P1 and H1 installations.
Maintain a 50mm clearance from any combustible materials during installation.
SKU: 3-400-102
| Technical Specifications | |
|---|---|
| Material | 316L Stainless Steel |
| Design Standard | EN 1856-1 |
| Gasket Type | High-pressure sealing (P1/H1) |
| Jointing System | Push-fit with Locking Band |
| Application | Boilers, ovens, ventilation systems, chimney shaft liners |
| Temperature Range | Suitable for both high and low temperatures |
| Pressure Handling | Capable of managing both positive and negative pressures |
| Minimum Clearance | 50mm from combustible materials |
| Warranty | 10 Years |
