Non-concentric increaser 2 diameters - Ø 200
At a Glance
- Premium 316L Stainless Steel construction
- Non-concentric design for smooth diameter transition
- Push-fit jointing system with locking band
- High-pressure sealing gasket for P1/H1 applications
- Suitable for both condensing and non-condensing flue gases
- CE-marked and compliant with EN 1856-1 standards
- Designed for inclined installations to prevent condensate pooling

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 2 diameters - Ø 200 by SWPro is a premium choice for expanding your flue system while ensuring efficiency and safety. This modular single-wall flue system is crafted from high-grade 316L stainless steel, renowned for its durability and resistance to corrosion. The SWPro system features a high-pressure sealing gasket rated P1/H1, making it suitable for both high and low-temperature applications.
Whether dealing with non-condensing or condensing applications, this system can handle flue gases in both positive and negative pressure environments. Ideal for use with boilers, ovens, ventilation systems, and as a chimney shaft liner, it accommodates a variety of installations with ease. The CE-marked SWPro system can be fitted using a simple push-fit jointing system complemented by a locking band for secure attachment.
For P1 and H1 installations, jointing gaskets are required at every connection. Additionally, a mandatory clearance of 50mm from any combustible materials ensures safe operation.
SKU: 3-200-104
Technical Specifications | |
---|---|
SKU | 3-200-104 |
Product Name | Non-concentric increaser 2 diameters - u00d8 200 |
Materials | 316L Stainless Steel (Inner), N/A (Outer) |
System | SWPro |
Fuels | Gas, Oil |
Approvals | CE Marked |
Compliance | EN 1856-1 |
Sealing Gasket Rating | P1/H1 |
Clearance Requirement | 50mm to combustible materials |
Warranty | 10 Years |
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, April 29th. If you need faster stove or fireplace delivery please give us a call. We can often 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. Mi-Flex offers a lifetime guarantee. 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. If you find it cheaper within 48 hours, we'll refund the difference.
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National Flues Ltd Verdict
National Flues highly recommends the Non-Concentric Increaser 2 Diameters - Ø 200 for its exceptional quality and versatility. With nationwide delivery and services for both retail and trade customers, you can count on us to meet your flue system needs.
The Non-Concentric Increaser 2 Diameters - Ø 200 is used to smoothly increase the diameter of a flue system, particularly in inclined runs, to prevent condensate pooling and ensure efficient gas flow.
National Flues is a leading supplier of high-quality fireplaces and flues across the UK, known for unbeatable prices, reliable delivery, and excellent customer service for both retail and trade customers.
