Non-concentric increaser 2 diameters - Ø 500
At a Glance
- Constructed from premium 316L stainless steel for lasting durability.
- Engineered for both high and low temperature applications, including non-condensing and condensing systems.
- Quick push-fit jointing system secured by a robust Locking Band.
- Increases flue diameter in two steps to efficiently prevent condensate pooling.
- Fully compliant with EN 1856-1 standards and CE marked for safety and quality.

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 500 is an integral component of the SWPro modular single wall flue system. Made of superior 316L grade stainless steel with a high-pressure sealing gasket (P1/H1), this increaser is designed for both high and low temperature settings, accommodating non-condensing and condensing applications. Ideal for boilers, ovens, ventilation systems, and chimney shaft liners, it offers maximum versatility in various industrial and commercial applications.
Installation is straightforward with a push-fit jointing system secured by a Locking Band. Remember to fit jointing gaskets on every joint in P1 and H1 installations and maintain a clearance of 50mm from any combustible materials.
SKU: 3-500-104
Technical Specifications | |
---|---|
SKU | 3-500-104 |
Material | 316L Stainless Steel |
System | SWPro |
Certifications | CE, EN 1856-1 standards |
Temperature Range | Designed for both high and low temperature applications |
Jointing Method | Push-fit system with Locking Band |
Clearance Requirement | 50mm from combustible materials |
Diameter | u00d8 500 |
Warranty | 10 Years |
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Friday, April 25th. 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 Non-concentric Increaser 2 diameters - Ø 500 is a top-notch product from our SWPro line. Perfect for various applications, it's built robustly with high-grade stainless steel and is quick and easy to install. Our delivery is fast and reliable nationwide, and we cater to both retail and trade customers. Highly recommended!
The Non-concentric Increaser is designed to increase the diameter of a flue system by two sizes, particularly useful in inclined runs to prevent condensate pooling.
National Flues is a trusted supplier of fireplaces and flues, offering competitive pricing and dependable delivery services across the UK. Catering to both retail and trade customers, we ensure seamless transactions with secure online payment options.
