Increaser - Ø 600
At a Glance
- Constructed from high-grade 316L stainless steel
- CE marked and compliant with EN 1856-1 standards
- Easy push-fit jointing system with secure locking band
- Suitable for both non-condensing and condensing applications
- Versatile use in boilers, ovens, ventilation systems and chimney shaft liners
- Maintains a safe 50mm clearance 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 Ø 600 Increaser is a meticulously engineered component of the SWPro single wall flue system, crafted from 316 grade stainless steel. This increaser is CE marked, verifying its high standards and compliance with EN 1856-1 regulations. Designed to handle both high and low temperatures and suitable for non-condensing and condensing applications, this versatile increaser can be employed in various setups, including boilers, ovens, ventilation systems, and chimney shaft liners.
Its robust construction ensures durability and performance, with different thickness options based on the flue diameter. With an easy push-fit jointing system secured by a locking band, installation is straightforward, requiring joint gaskets for P1 and H1 setups. Always maintain a 50mm clearance from any combustible materials to ensure safety.
SKU: 3-600-002
Technical Specifications | |
---|---|
Material | 316L Stainless Steel |
CE Marked | Yes |
Standard | EN 1856-1 |
Temperature Range | High and Low |
Diameter Transition | 130ID to 150ID |
Installation System | Push-fit jointing with locking band |
Minimum Clearance | 50mm from combustible materials |
Warranty | 10 Years |
Fuels | Gas, Oil |
Approval | CE |
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
Our Ø 600 Increaser is a top-tier product designed for enhancing your chimney flue system's efficiency. Reliable, high-quality, and CE marked, this increaser ensures superior performance in both residential and commercial settings. At National Flues, we take pride in delivering nationwide, catering to both retail and trade customers with unmatched reliability.
The Ø 600 Increaser is used to increase the diameter of an existing flue system, ensuring improved efficiency and airflow in both residential and commercial applications.
National Flues is a renowned supplier of fireplaces and flues, catering to retail and trade customers across the UK. Known for their competitive prices, reliable delivery, and excellent customer service, they offer secure online payments and trade account options.
