Non-concentric increaser 3 diameters - Ø 200
At a Glance
- Modular design increases flue diameter in three stages
- Constructed from durable 316L stainless steel
- High-pressure sealing gasket (P1/H1) ensures leak-proof performance
- Easy push-fit joint system with secure locking bands
- CE marked and certified under EN 1856-1
- Suitable for boilers, ovens, and ventilation systems

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 200 is a highly versatile modular component from the SWPro range, designed to effortlessly increase flue diameter over three increments. Constructed from durable 316L grade stainless steel, it ensures long-lasting performance in a variety of applications including boilers, ovens, chimney liners, and ventilation systems. The high-pressure sealing gasket P1/H1 guarantees secure and leak-proof joints, fit for both high and low temperature operations, as well as non-condensing and condensing conditions.
The SWPro system is CE marked, certified under EN 1856-1 standards, ensuring compliance and safety for both domestic and commercial installations. This increaser features a push-fit jointing system with locking bands for easy and quick assembly. For P1 and H1 installations, joint gaskets must be included at every joint, with a mandated 50mm distance from any combustible materials.
SKU: 3-200-204
Technical Specifications | |
---|---|
Model | Non-concentric increaser 3 diameters - u00d8 200 |
Materials | 316L Stainless Steel (Inner) |
Certification | CE, EN 1856-1 |
Sealing | High-pressure gasket (P1/H1) |
Jointing System | Push-fit with locking bands |
Temperature Range | Suitable for high and low temperature operations |
Compatibility | Boilers, ovens, chimney liners, ventilation systems |
Clearance Requirement | 50mm from combustible materials |
Warranty | 10 Years |
System | SWPro |
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 Non-Concentric Increaser 3 Diameters - Ø 200 is an outstanding choice for any flue system, providing exceptional versatility and reliability. With our rarely beaten prices, nationwide delivery, and support for both retail and trade customers, you can trust National Flues for all your needs.
The Non-Concentric Increaser is used to seamlessly increase the diameter of flue systems across three stages, enhancing capacity and performance in both commercial and residential setups.
National Flues is a trusted supplier of high-quality fireplaces and flues across the UK. Offering competitive prices, reliable delivery, and exceptional customer service, we cater to both retail and trade customers.
