Increaser - Ø 500
At a Glance
- Made from high-grade 316L stainless steel
- Innovative push-fit jointing system with locking band
- Compatible with both high and low-temperature applications
- CE marked and compliant with EN 1856-1
- Enhances flue efficiency by increasing diameter
- High-pressure sealing gaskets ensure secure, leak-free joints

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 500 is part of the SWPro range, a high-grade modular single-wall flue system made from premium 316L stainless steel. This versatile increaser is designed to increase the diameter of your flue, enhancing its efficiency. It's ideal for both high and low-temperature applications and can handle non-condensing and condensing flue gases in positive and negative pressure environments.
Perfect for various applications, including boilers, ovens, ventilation systems, and chimney shaft liners.Constructed with high-pressure sealing gaskets (P1/H1), the SWPro ensures a secure and efficient installation. The modular design features a push-fit jointing system, secured with a locking band. In P1 and H1 installations, jointing gaskets need to be fitted on every joint to guarantee optimum performance.
Always maintain a 50mm distance from combustible materials such as wood or plasterboard to ensure safety.The SWPro is CE marked and meets high European standards (EN 1856-1), guaranteeing reliability and safety. Available in various diameters, this increaser is especially suited for commercial and industrial applications.
SKU: 3-500-002
Technical Specifications | |
---|---|
Product ID | 4740 |
SKU | 3-500-002 |
Diameter | u00d8 500 |
Inner Material | 316L Stainless Steel |
System | SWPro |
Approvals | CE, EN 1856-1 |
Combustible Clearance | 50mm |
Warranty | 10 Years |
Fuels | Gas, Oil |
Installation Note | Use high-pressure sealing gaskets (P1/H1) on all joints |
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.
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National Flues Ltd Verdict
The Increaser - Ø 500 from National Flues is an essential component for any high-performing flue system. Its high-quality construction and versatile application options make it a top choice for both retail and trade customers. Plus, with our nationwide delivery and unbeatable prices, you can't go wrong.
The Increaser - Ø 500 is used to increase the diameter of your flue system, enhancing its performance and efficiency. It is ideal for a variety of industrial and commercial applications.
National Flues is a trusted supplier of high-quality flues and fireplaces serving both retail and trade customers nationwide. Known for unbeatable prices and reliable delivery, National Flues offers secure online payments and trade accounts for ultimate convenience.
