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Increaser - Ø 450 (3-450-002)

The Increaser - Ø 450 from National Flues integrates state-of-the-art 316L stainless steel engineering within the renowned SWPro modular flue system. Ideal for boilers, ovens, ventilation systems, and other heating applications, this premium flue accessory facilitates seamless diameter transitions. Engineered to endure both high and low temperature conditions, it stands as a top choice for professionals seeking safe and reliable flue solutions.
Now only £321.99
including free delivery Give us a call if you find it cheaper and we'll normally price match.

 

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At a Glance

    Precision-engineered from 316L stainless steel

    Modular SWPro flue system ensuring seamless component integration

    Push-fit jointing system enhanced by a secure Locking Band

    Compliant with EN 1856-1 and CE marked

    Designed for both high and low temperature applications

    Suitable for boilers, ovens, and various ventilation systems

    High-pressure sealing with P1/H1 classified gasket

    Backed by a 10-year warranty for peace of mind

Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, August 5th. This is based on current lead times for this product. If you need a stove, or other bulky product, to be delivered by a specific time in the next 7 days, then please give us a call on 01670 206 999. We can sometimes 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 and you can read in our blog about they types and terms and conditions for warranties. Mi-Flex flue liner, for example, comes with a lifetime guarantee. Give us a call if you want to know about a specific warranty. Returns for damaged items are covered by insurance; non-damaged returns incur return delivery costs.

Best Price Match Guarantee +

We will match any price, like-for-like, on a retail basis. Give us a call if you find it cheaper and want to buy from us.

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]

The Increaser - Ø 450 is an integral part of the SWPro modular single wall flue system, constructed from top-quality 316L grade stainless steel. This versatile flue system is designed to handle a wide range of applications, including boilers, ovens, and ventilation systems, accommodating both high and low temperatures. The system supports both non-condensing and condensing applications with positive and negative pressure flue gases.The SWPro system is known for its robustness, featuring a high-pressure sealing gasket P1/H1, making it suitable for even the most demanding installations.

Its modular design includes a push-fit jointing system and a Locking Band for secure assembly, ensuring ease of installation. Adhering to the stringent EN 1856-1 standards, the SWPro system is CE marked, ensuring compliance and safety.For installations requiring P1 and H1 classifications, jointing gaskets are necessary for every connection. Additionally, a minimum distance of 50mm must be maintained from any combustible materials such as wood or plasterboard to ensure safety.

SKU: 3-450-002

Technical Specifications
SKU3-450-002
Material316L Stainless Steel
SystemSWPro Modular Flue System
CertificationsCE, EN 1856-1
Sealing GasketHigh-pressure P1/H1
Suitable FuelsGas, Oil
Minimum Combustible Distance50mm
Warranty10 Years
Ensure all joints are fitted with the appropriate P1/H1 classified jointing gaskets. The push-fit assembly method, combined with the Locking Band, simplifies installation while securing robust connections. Always maintain a minimum distance of 50mm from combustible materials such as wood or plasterboard. Follow installation guidelines carefully to adhere to EN 1856-1 standards and ensure system safety. If in doubt, consult with a professional installer to verify all safety measures are in place.

The Increaser - Ø 450 is made from high-grade 316L stainless steel, ensuring durability and resistance to corrosion.

This increaser is versatile and can be used in various applications including boilers, ovens, ventilation systems, and as a chimney shaft liner.

Yes, the SWPro flue system, including the Increaser - Ø 450, is CE marked and complies with the EN 1856-1 standards.

The push-fit jointing system allows for easy assembly of the flue components, secured with a Locking Band for enhanced stability.

Yes, for P1 and H1 installations, jointing gaskets must be fitted at every connection point to ensure a secure seal.

Maintain a minimum distance of 50mm from the outside of the flue to any combustible materials like wood or plasterboard.

Absolutely. The Increaser - Ø 450 is designed to handle both high and low temperature applications, making it highly versatile.

What our experts say!

"The Increaser - Ø 450 is a superb addition to any flue system, renowned for its durability and versatility. Perfect for both retail and trade customers, National Flues offers reliable nationwide delivery at unbeatable prices."

The Increaser - Ø 450 is used to increase the diameter within a flue system, ensuring seamless transitions and compatibility between different component sizes.

National Flues is a leading supplier of fireplaces and flues across the UK, known for competitive pricing, reliable delivery, and catering to both retail and trade customers.

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