Increaser 2 diameters - Ø 300
At a Glance
- Crafted from durable 316L stainless steel
- Designed for a variety of thermal applications (condensing and non-condensing)
- Quick push-fit jointing system with a secure locking band
- Complies with CE and EN 1856-1 standards
- Suitable for both positive and negative pressure flue gases
- Maintains 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
Introducing the Increaser 2 diameters - Ø 300, an essential modular single-wall flue system component, crafted from 316-grade stainless steel with a high-pressure sealing gasket (P1/H1). SWPro is a versatile flue system perfect for various applications, including high and low-temperature settings, both non-condensing and condensing environments with positive and negative pressure flue gases. Ideal for use with boilers, ovens, ventilation systems, and as a chimney shaft liner.
The increaser is compliant with CE standards and approved by EN 1856-1, ensuring top-notch safety and performance. Featuring a push-fit jointing system secured by a locking band, SWPro promises ease of installation and reliable operation. Remember to maintain a 50mm clearance from combustible materials during installation.
SKU: 3-300-102
Technical Specifications | |
---|---|
Material | 316L Stainless Steel |
Applicable Diameter | u00d8 300 |
Certifications | CE, EN 1856-1 |
Installation System | Push-fit jointing with locking band and high-pressure sealing gasket |
Fuel Compatibility | Gas, Oil |
Operating Conditions | Suitable for both high and low temperature applications, condensing and non-condensing |
Clearance Requirement | 50mm from combustible materials |
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.
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National Flues Ltd Verdict
At National Flues, we pride ourselves on offering reliable, high-quality products like the Increaser 2 Diameters - Ø 300. Ideal for both retail and trade customers with dependable nationwide delivery options.
The Increaser 2 Diameters - Ø 300 is used to increase the diameter of an existing flue system, ensuring an efficient and seamless transition for various applications.
National Flues is a trusted supplier of high-quality fireplaces and flues across the UK, catering to both retail and trade customers with reliable delivery and unbeatable prices.
