Increaser 3 diameters - Ø 200
At a Glance
- Constructed from high-grade 316L stainless steel
- CE marked and compliant with EN 1856-1 standards
- Features a modular push-fit jointing system with secure Locking Band
- High-pressure sealing gasket suitable for both P1 and H1 installations
- Versatile for use in boilers, ovens, ventilation systems, and chimney shaft liners
- Maintains safe installation with a recommended 50mm distance from combustibles

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 3 diameters - Ø 200 is a robust and versatile component of the SWPro modular single wall flue system. Crafted from high-quality 316L grade stainless steel, it offers durability and reliability across a multitude of applications. This flue increaser is designed with a high-pressure sealing gasket P1/H1, making it suitable for both high and low-temperature environments.
It’s perfect for boilers, ovens, ventilation systems, and as a chimney shaft liner. CE marked and compliant with EN 1856-1 standards, this increaser ensures the highest safety and performance. The modular design features a convenient push-fit jointing system secured by a Locking Band, making installation straightforward.
Remember, for P1 and H1 installations, always use jointing gaskets on every joint and maintain a safe 50mm distance from any combustible materials.
SKU: 3-200-202
Technical Specifications | |
---|---|
Material | 316L Stainless Steel |
Standard | EN 1856-1, CE marked |
Sealing | High-pressure sealing gasket (P1/H1) |
Fuel Compatibility | Gas, Oil |
Clearance To Combustibles | 50mm |
Warranty | 10 Years |
Design | Modular push-fit jointing system, secured with Locking Band |
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
The Increaser 3 Diameters - Ø 200 is a stellar choice for both retail and trade customers. At National Flues, we pride ourselves on our competitive pricing and reliable nationwide delivery. Trust us for all your flue system needs.
The Increaser 3 Diameters - Ø 200 is used to increase the diameter of a flue system, ensuring seamless transition and improved performance across various applications.
National Flues is a leading supplier of fireplaces and flues in the UK, known for competitive pricing, reliable delivery, and excellent customer service. Whether you are a retail or trade customer, National Flues has the products and expertise to meet your needs.
