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Adjustable pipe 0,50 - 0,82 m - Ø 400 (3-400-014)

Discover the unparalleled quality of the National Flues Adjustable Pipe 0.50 - 0.82 m - Ø 400, engineered from premium 316L stainless steel. This versatile flue component is perfect for modern boilers, ovens, and ventilation systems. Designed to meet EN 1856-1 standards, our adjustable flue pipe combines durability, safety, and ease of installation. Ideal for both commercial and domestic applications, it offers flexible length adjustments and reliable high-pressure sealing, ensuring your install Read more...
The price you pay today £217.99
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At a Glance

    Crafted from high-grade 316L stainless steel
    Adjustable length from 0.50 to 0.82 m for custom installations
    Robust design with a high-pressure sealing gasket (P1/H1)
    CE marked and compliant with EN 1856-1 standards
    Versatile use for boilers, ovens, ventilation systems, and chimney liners
    Easy installation with a push-fit jointing system and Locking Band
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Friday, June 27th. 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.

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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.

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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.

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Have Questions?
Phone: 01670 206999
Email: [email protected]

The Adjustable Pipe 0.50 - 0.82m - Ø 400 from our SWPro series is a top-tier modular single wall flue system. Constructed using high-grade 316L stainless steel, this adjustable pipe offers unparalleled durability and efficiency. It features a high-pressure sealing gasket (P1/H1), making it suitable for both high and low-temperature applications in positive and negative pressure environments.

This versatile flue system is ideal for boilers, ovens, ventilation systems, and can also serve as a chimney shaft liner. The SWPro system is CE marked and adheres to stringent safety standards (EN 1856-1). Installation is straightforward with a push-fit jointing system secured by a Locking Band.

For pressurised systems, ensure the centre gasket is fitted.

SKU: 3-400-014

Technical Specifications
Material316L Stainless Steel
Adjustable Length0.50 - 0.82 m
DiameterØ 400 mm
CE MarkedYes (EN 1856-1 compliant)
Gasket TypeHigh-pressure sealing (P1/H1)
Warranty10 Years
ApplicationsBoilers, ovens, ventilation systems, chimney shaft liners
- Ensure all components are clean and free from debris before installation - Use the push-fit jointing system to connect sections securely - Secure connections with the Locking Band for enhanced stability - Fit the centre gasket when using the system for pressurised applications - Maintain a minimum clearance of 50mm from any combustible materials as a safety measure

The adjustable pipe is made from high-grade 316L stainless steel, offering excellent durability and corrosion resistance.

This pipe is suitable for both high and low temperatures, and can handle flue gases in both positive and negative pressure conditions.

The adjustable pipe is ideal for a wide range of applications, including boilers, ovens, ventilation systems, and as a chimney shaft liner.

Yes, the SWPro adjustable pipe is CE marked, complying with the EN 1856-1 standards.

Installation is straightforward with a push-fit jointing system secured together by a Locking Band. Ensure jointing gaskets are fitted for P1 and H1 installations.

Keep a distance of at least 50mm from the outside of the flue to any combustible materials like wood or plasterboard.

Various thicknesses are available depending on the flue diameter, ensuring optimal performance and safety.

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