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Reducer 3 diameters - Ø 450 (3-250-208)

Enhance your chimney and flue system with National Flues' Reducer 3 Diameters - Ø 450. This premium flue adaptor, crafted from superior 316L Stainless Steel, is designed to deliver reliable, secure connections between differing flue sizes. Ideal for commercial boilers, ovens, and ventilation systems, our adaptor meets rigorous EN 1856-1 standards and is CE marked, making it the perfect choice for professional installers and homeowners alike.
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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

    High-grade 316L Stainless Steel construction for maximum durability

    Versatile design accommodating three flue diameters (Ø 450, Ø 250, etc.)

    Quick and modular push-fit jointing system with locking bands

    CE marked and compliant with EN 1856-1 standards

    High-pressure sealing gasket (P1/H1) ensures secure, airtight connections

    Suitable for both high and low temperature, condensing and non-condensing applications

    Maintains a safe 50mm clearance from combustible materials

Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, July 8th. 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]

Introducing the Reducer 3 diameters - Ø 450, a high-quality flue adaptor from National Flues. Perfect for a wide variety of applications, this reducer enables seamless transitioning between flue systems of different sizes. Constructed from durable 316L stainless steel, our reducer ensures longevity and performance.

It features a high-pressure sealing gasket (P1/H1) and is suitable for both high and low temperatures, as well as non-condensing and condensing applications, with flue gases in positive and negative pressure settings. Certified with CE marking, it meets the EN 1856-1 standards. Installation is straightforward thanks to its modular push-fit jointing system and locking bands, ensuring a secure assembly.

The system requires a minimum distance of 50mm from any combustible material.

SKU: 3-250-208

Technical Specifications
SKU3-250-208
Product NameReducer 3 Diameters - u00d8 450
Material316L Stainless Steel
GasketHigh-pressure sealing gasket (P1/H1)
CertificationCE, EN 1856-1
Temperature RangeSuitable for both high and low temperatures; for condensing and non-condensing applications
Minimum Clearance50mm from combustible materials
Installation MethodModular push-fit jointing with locking bands
Price415.80 GBP (Our Price)
- Before installation, ensure that there is a minimum clearance of 50mm from any combustible material. - Inspect all components for any visible damage or defects. - Follow the modular push-fit jointing system instructions closely, securing the adaptor with the provided locking bands. - Use the appropriate high-pressure gaskets (P1/H1) to establish an airtight seal. - Once assembled, conduct a thorough safety check to confirm that all connections are secure and leak-free. - Refer to the manufacturer's safety guidelines during installation to ensure compliance and optimal performance.

This product is designed to reduce the diameter within a flue system, making it adaptable for various applications such as boilers, ovens, and ventilation systems.

Yes, it is suitable for both high and low-temperature environments, accommodating non-condensing and condensing applications.

The reducer is made from high-grade 316L stainless steel, ensuring durability and performance.

The reducer uses a modular push-fit jointing system secured with locking bands. It also requires gaskets for P1 and H1 installations to ensure airtight joints.

The Reducer 3 Diameters - Ø 450 is CE-marked and complies with EN 1856-1 standards.

You should maintain at least a 50mm distance from the outside of the flue to any combustible material such as wood or plasterboard.

Yes, National Flues offers trade accounts and special pricing for trade customers.

What our experts say!

"The Reducer 3 Diameters - Ø 450 from National Flues is an outstanding product. Crafted from high-grade 316L stainless steel, this reducer is versatile for various applications. We offer unbeatable prices, reliable nationwide delivery, and serve both retail and trade customers."

The Reducer 3 Diameters - Ø 450 is used to decrease the diameter within a flue system, making it suitable for a range of high and low-temperature, condensing and non-condensing applications.

National Flues is a leading supplier of fireplaces and flues in the UK, offering high-quality products at competitive prices. We cater to both retail and trade customers, with reliable nationwide delivery and secure online payments.

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