Non-concentric increaser - Ø 600
At a Glance
- High-grade 316L stainless steel construction
- Designed for inclined flue installations to prevent condensate pooling
- Simple push-fit jointing system with robust locking band
- Fully compliant with EN 1856-1 and CE marked for safety
- Suitable for both high and low temperature applications with gas and oil fuels

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 Ø 600 is part of our modular single wall flue system, SWPro. This system is constructed from high-grade 316L stainless steel, known for its durability and resistance to high pressure, ensuring long-lasting performance. The increaser's primary function is to enhance the diameter of your flue system, preventing potential condensate pooling when installed in an inclined run.
Suitable for both high and low temperature applications, it handles non-condensing and condensing flue gases under positive and negative pressure with ease. The SWPro system boasts a CE mark and adheres to strict European standards (EN 1856-1), guaranteeing quality and safety. Installation is made simple with a push-fit jointing system and locking band, while maintaining a safe distance from combustible materials.
SKU: 3-600-004
Technical Specifications | |
---|---|
Product Name | Non-concentric Increaser - u00d8 600 |
SKU | 3-600-004 |
Inner Material | 316L Stainless Steel |
Outer Material | N/A |
Standards | EN 1856-1, CE Marked |
System | SWPro Modular Single Wall Flue |
Installation Method | Push-fit jointing system with locking band |
Safe Distance | 50mm from combustible materials |
Fuel Compatibility | Gas, Oil |
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.
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National Flues Ltd Verdict
The Non-concentric Increaser Ø 600 from National Flues is a top-tier product designed for both retail and trade customers. With our extensive nationwide delivery network and unbeatable prices, you can trust us to provide reliable and high-quality flue solutions.
The Non-concentric Increaser - Ø 600 is designed to increase the diameter of a flue system, particularly useful in inclined installations to prevent condensate pooling.
National Flues is a trusted supplier of high-quality fireplaces and flues across the UK, serving both retail and trade customers with dependable service and competitive pricing.
