Increaser - Ø 200
At a Glance
- Premium 316L Stainless Steel construction
- Seamless push-fit jointing system with locking band
- High-pressure sealing gasket P1/H1 for reliable performance
- Versatile application: compatible with both condensing and non-condensing systems
- CE marked for adherence to stringent European safety standards
- Designed for optimal clearances with a recommended 50mm distance from combustible materials

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 - Ø 200 is part of the SWPro modular single-wall flue system, engineered for supreme durability and versatility. Crafted from high-grade 316L stainless steel, it is equipped with a high-pressure sealing gasket P1/H1, making it suitable for both high and low temperature applications. Whether you are dealing with non-condensing or condensing applications in positive or negative pressure scenarios, this increaser has you covered.
Ideal for use with boilers, ovens, ventilation systems, and as a chimney shaft liner, this increaser ensures optimal performance in a wide variety of environments. The system is easy to install with a push-fit jointing mechanism and locking band, and it meets the highest safety standards with CE marking. Keep a recommended distance of 50mm from any combustible materials during installation.
SKU: 3-200-002
Technical Specifications | |
---|---|
Model Number | 3-200-002 |
Material | 316L Stainless Steel |
Gasket Type | High-pressure sealing gasket P1/H1 |
Application | Boilers, ovens, ventilation systems, chimney shaft liners |
Pressure Rating | Suitable for both high and low temperature operations |
Certification | CE marked |
Clearance Requirement | 50mm from combustibles |
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.
Compatible and other products that may be of interest...
National Flues Ltd Verdict
The Increaser - Ø 200 is an exceptional choice for anyone needing to increase flue diameter effectively. With high-grade stainless steel construction and universal application, this product meets all your flue system needs. Reliable nationwide delivery and top-notch customer service for both retail and trade customers.
The Increaser - Ø 200 is designed to increase the diameter of your existing flue system, ensuring seamless transitions and efficient performance for various applications including boilers, ovens, and ventilation systems.
National Flues is a leading supplier of high-quality fireplaces and flues across the UK. Known for its competitive pricing and reliable delivery, the company caters to both retail and trade customers with a focus on superior customer service and secure online transactions.
