Non-concentric increaser 2 diameters - Ø 350 (3-350-104)
At a Glance
- Crafted from 316L Stainless Steel for exceptional durability and resistance to high pressure
Modular push fit jointing system secured with a Locking Band for a reliable seal
Compliant with EN 1856-1 and CE marked for safety and quality assurance
Versatile application: suitable for boilers, ovens, ventilation systems, and chimney shaft liners
Designed to prevent condensate pooling in inclined piping runs by accommodating two diameters
Engineered for both condensing and non-condensing applications
Maintains a safe 50mm distance from combustible materials during installation
Backed by a 10-year warranty for long-term peace of mind
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, July 22nd. This is based on current lead times for this product. 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 on 01670 206 999. 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.
Best 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]
- Summary
- Specs
- Install
- FAQs
The Non-concentric increaser 2 diameters - Ø 350 is an essential component in the SWPro modular single wall flue system. Crafted from durable 316 grade stainless steel, it ensures longevity and resistance to high pressure, both in condensing and non-condensing applications. The SWPro system is versatile and can be integrated into various applications such as boilers, ovens, ventilation systems, and chimney shaft liners.
With CE marking and compliance with EN 1856-1 standards, this increaser is designed for optimal performance. Its modular push fit jointing system, secured with a Locking Band and high-pressure sealing gaskets, ensures seamless installation. Ensure a safe distance of 50mm from any combustible materials when installing.
SKU: 3-350-104
| Technical Specifications | |
|---|---|
| Material | 316L Stainless Steel (Inner), N/A (Outer) |
| Diameter | u00d8350 (2 diameters u2013 u00d8350 to u00d8350) |
| Standards | EN 1856-1, CE Marked |
| System | SWPro Modular Push Fit Jointing |
| Approval | CE |
| Distance To Combustibles | 50mm |
| Warranty | 10 Years |
| Application | Suitable for condensing and non-condensing systems; used in boilers, ovens, and ventilation systems |
What our experts say!
"This Non-Concentric Increaser is a robust and dependable choice for any commercial chimney flue system. At National Flues, we pride ourselves on our competitive pricing and reliable nationwide delivery, serving both retail and trade customers."
The Non-Concentric Increaser is designed to seamlessly expand the diameter of a chimney flue system by two sizes, primarily in inclined piping runs. This prevents condensate pooling and maintains system efficacy.
National Flues is a trusted supplier of high-quality fireplaces and flues, offering competitively priced and reliable solutions with nationwide delivery. We serve both retail and trade customers with dedication and expertise.
