Non-concentric increaser 3 diameters - Ø 400 (3-400-204)
At a Glance
- Constructed from high-grade 316L stainless steel for durability and corrosion resistance
Modular push-fit joint secured with a locking band for reliable, simple installation
CE marked and compliant with EN 1856-1 standards, ensuring high safety and performance
Designed to prevent condensate pooling in inclined flue systems
Suitable for a variety of high and low temperature applications including boilers, ovens, and ventilation systems
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 Non-concentric increaser 3 diameters - Ø 400 from National Flues is a top-of-the-line component designed for a wide range of high and low temperature applications. Made of durable 316L stainless steel, this modular flue system is perfect for boilers, ovens, ventilation systems, and chimney shaft liners. With a high-pressure sealing gasket P1/H1, it offers reliable performance in both non-condensing and condensing environments.
The SWPro system is CE marked and complies with EN 1856-1 standards, ensuring safety and efficiency. It features a push-fit jointing system secured with a locking band, making installation straightforward. Keep a distance of 50mm from any combustible materials for maximum safety.
SKU: 3-400-204
| Technical Specifications | |
|---|---|
| Material | 316L Stainless Steel |
| Max Diameter | Ø 400 |
| Fire Safety Distance | 50mm |
| CE Marking | Yes |
| Pressure Rating | High-Pressure Gasket P1/H1 |
| Compliance | EN 1856-1 |
| Warranty | 10 Years |
| System | SWPro |
| Suitable For | Gas, Oil applications |
