× National Flues
We Won't Be Beaten On Price.
Free Delivery on Orders Over £100
100% 5 Star Reviews on Trustpilot
Free Flue Design Service Available
Need Help? 01670 206999 (8am-5pm)

Reducer 2 diameters - Ø 400

National Flues introduces the Reducer 2 Diameters - Ø 400, a premium modular stainless steel flue adaptor designed for versatile use in boil Read More...
Hover to Zoom / Click for Gallery
Unbeatable Value £392.49
including Free Delivery Buy with confidence. If you find this cheaper within 48 hours of checkout, we'll refund the difference.

At a Glance

  • Crafted from high-grade 316L Stainless Steel
  • Complies with EN 1856-1 standards and is CE marked
  • Versatile design for both condensing and non-condensing applications
  • Features a push-fit jointing system with a secure locking band
  • Requires a 50mm clearance from combustible materials for enhanced safety

 

Payment Options

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]

Our Reducer 2 diameters - Ø 400 is part of the SWPro modular single wall flue system, crafted from top-grade 316L stainless steel. Engineered for high and low temperatures, this universal flue system is suitable for both non-condensing and condensing applications, accommodating positive and negative pressure flue gases. The SWPro system is versatile, perfect for boilers, ovens, ventilation systems, and chimney shaft liners.

The robust construction, coupled with a high-pressure sealing gasket (P1/H1), ensures enduring performance and safety. The product holds a CE mark and meets stringent EN 1856-1 standards for various diameters, making it a top choice for professionals. Installation is a breeze with its push-fit jointing system and secure locking band.

Remember to maintain a 50mm clearance from combustible materials.

SKU: 3-300-108

Technical Specifications
SKU3-300-108
Diameter Rangeu00d8 400 stepping down to smaller diameters (e.g., u00d8 300)
Inner Material316L Stainless Steel
SystemSWPro Modular Single Wall
ApprovalsCE Mark, EN 1856-1 compliant
Fuel CompatibilityGas, Oil
Clearance Requirement50mm from combustible materials
InstallationPush-fit jointing with secure locking band
Warranty10 Years
- Ensure a 50mm clearance from all combustible materials before installation - Follow the push-fit jointing instructions closely for safe and secure assembly - Use the provided locking band to secure the reducer in place and prevent accidental disconnections - Verify that all joints are properly sealed to avoid any leakage of flue gases - Consider professional installation to ensure all safety standards are met

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

Yes, the SWPro system is designed for both condensing and non-condensing applications, suitable for various temperature ranges.

Ensure all joints are fitted with the required gaskets and a 50mm clearance from any combustible materials is maintained during installation.

The reducer complies with EN 1856-1 standards and is CE marked, ensuring it meets high safety and quality benchmarks.

This reducer is versatile and can be used with boilers, ovens, ventilation systems, and as a chimney shaft liner.

It features a push-fit jointing system secured with a locking band, ensuring a tight and reliable connection.

Yes, it features a high-pressure sealing gasket (P1/H1), making it suitable for high-pressure environments.
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.

Read our buyers guide for this Reducer 2 diameters - Ø 400

National Flues Ltd Verdict

The Reducer 2 Diameters - Ø 400 is a highly reliable and durable product perfect for your flue system needs. Available at unbeatable prices, we at National Flues ensure prompt nationwide delivery for both retail and trade customers.

This product is used to decrease the flue diameter in modular single wall flue systems, making it versatile for various heating and ventilation setups.

National Flues is a trusted supplier of fireplaces and flues across the UK, known for competitive prices, reliable delivery, and excellent customer service for both retail and trade customers.

 

Our Rating Image

Order now to secure robust performance and streamlined system integration.

Your recently viewed products:

Multiple Payment Options- including Klarna, Clearpay, Mastercard, Visa and Paypal
Free Design Service