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Reducer - Ø 125 (3-100-008)

At National Flues, the SWPro Reducer - Ø 125 epitomises quality and efficiency in modular flue systems. Designed for a variety of applications including boilers, ovens, and ventilation systems, this reducer offers a reliable and secure solution for transitioning between different flue diameters. If you require additional accessories to complete your installation, ensure you explore our comprehensive range to optimise your chimney setup.
The price you pay today £60.99
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At a Glance

    High-grade 316L Stainless Steel construction
    High-pressure sealing gasket (P1/H1) for leak-free performance
    Modular design with push-fit jointing and Locking Band
    Complies with CE and EN 1856-1 standards
    Suitable for both gas and oil fuel applications
    Versatile for high and low temperature as well as condensing/non-condensing scenarios
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, June 24th. This is based on current delivery times for this product. Delivery for products not in our warehouses can be delayed because of third party carriers. 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. 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.

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 SWPro Reducer - Ø 125 is a high-quality modular flue component designed for versatility and durability. Constructed from 316L Stainless Steel, it is suitable for a wide range of applications including both high and low temperatures, non-condensing and condensing situations. The SWPro system is engineered for use in boilers, ovens, ventilation systems, and as a chimney shaft liner.

This reducer features a high-pressure sealing gasket (P1/H1) ensuring secure and efficient performance. The system's modular design allows for easy installation with a push-fit jointing system secured by a Locking Band. Compliance is assured with CE marking and adherence to EN 1856-1 standards, providing peace of mind and quality assurance.

SKU: 3-100-008

Technical Specifications
Material316L Stainless Steel
SizeReducer - u00d8 125 (transitioning from u00d8 100)
SystemSWPro Modular Flue System
SealingHigh-pressure sealing gasket (P1/H1)
StandardsCE, EN 1856-1
Fuel CompatibilityGas, Oil
InstallationPush-fit joint secured with Locking Band
Warranty10 Years
Minimum Distance To Combustibles50mm
Installation Instructions: Before beginning, ensure all flue components are thoroughly cleaned and free of debris. Each component should be connected using the recommended jointing gaskets for P1/H1 installations. Firmly push-fit each section into position and secure with the Locking Band. Always maintain a minimum clearance of 50mm from any combustible materials such as wood or plasterboard. For optimal safety and performance, follow the manufacturer's guidelines meticulously. In cases of uncertainty or when installing in challenging environments, it is advisable to consult a professional installer.

The SWPro Reducer is made from high-grade 316L Stainless Steel, offering durability and resistance to high temperatures and corrosion.

Yes, the SWPro Reducer is designed for both high and low temperature settings, as well as non-condensing and condensing applications.

The high-pressure sealing gasket (P1/H1) ensures that the flue system remains sealed under positive and negative pressures, preventing leaks and ensuring efficiency.

Installation is straightforward with a push-fit jointing system, secured by a Locking Band. Jointing gaskets should be used on every joint for P1 and H1 installations.

The SWPro Reducer is CE marked and complies with EN 1856-1 standards, providing assurance of its quality and performance.

Yes, the SWPro Reducer is versatile and suitable for use in ventilation systems in addition to boilers, ovens, and chimney shaft liners.

Ensure a distance of 50mm is maintained from the outside of the flue to any combustible material such as wood or plasterboard to prevent any safety hazards.

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