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Vertical pipe with drain - Ø 125 (3-125-026)

Enhance your HVAC installation with National Flues’ Vertical Pipe with Drain - Ø 125. Made from high-grade 316L stainless steel, this premium flue pipe is engineered for reliability in both boilers and ovens, as well as ventilation and chimney systems. Experience superior quality and performance with a product designed to meet strict EN 1856-1 standards, ensuring a versatile solution for your heating and flue needs.
The price you pay today £69.99
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At a Glance

    Constructed from premium 316L Stainless Steel
    Suitable for both high and low temperature applications
    Easy installation with push fit jointing system and Locking Band
    Fully compliant with EN 1856-1 and CE marked
    Versatile use in boilers, ovens, ventilation systems and chimney shaft liners
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Friday, June 20th. 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.

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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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Price Match Guarantee: If you find the same product cheaper within 48 hours, we’ll match it and refund the difference.

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

The Vertical pipe with drain - Ø 125 is a cornerstone of the SWPro modular single wall flue system, constructed from high-grade 316L stainless steel. Designed for a broad range of applications, this pipe excels in both high and low temperature settings, and is suitable for non-condensing as well as condensing environments. Whether you're dealing with positive or negative pressure flue gases, the SWPro system provides robust and secure connections thanks to its high-pressure sealing gasket P1/H1.

Rigorous testing and CE marking under EN 1856-1 standards guarantee superior quality and safety. Installation is straightforward with a user-friendly push fit jointing system secured by a Locking Band. An essential component for boilers, ovens, and ventilation systems, this vertical pipe also works effectively as a chimney shaft liner.

It is crucial to maintain a 50mm distance from any combustible materials during installation to ensure safety.

SKU: 3-125-026

Technical Specifications
Material316L Stainless Steel
Pipe Diameteru00d8 125 mm
StandardsEN 1856-1, CE marked
Installation Clearance50mm from combustibles
SystemSWPro Modular Single Wall Flue
Fuel CompatibilityGas, Oil
Warranty10 Years
JointingPush fit with Locking Band
Pressure RatingHigh-pressure sealing gasket P1/H1
Before beginning installation, ensure that the surrounding area is clear of any combustible materials, maintaining a minimum clearance of 50mm. Begin by securely connecting the vertical pipe using the user-friendly push fit jointing system. Ensure that the Locking Band is firmly in place to prevent any accidental disconnections. Always double-check that the fitting aligns with other components of the SWPro modular flue system. Follow the manufacturer's instructions closely and, if in doubt, consult a professional installer to ensure all safety standards are met.

The Vertical Pipe with Drain - Ø 125 is constructed from high-grade 316L stainless steel, ensuring durability and resistance to high temperatures.

Yes, it is designed for both high and low temperature applications, making it extremely versatile.

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

The SWPro system features a push fit jointing system that is secured with a Locking Band for ease of installation, ensuring a secure and reliable connection.

The pipe is CE marked and complies with EN 1856-1 standards, reflecting its high quality and safety.

Yes, it is designed to handle both condensing and non-condensing environments, making it very versatile.

Ensure you maintain a distance of 50mm from the outside of the flue to any combustible material (wood, plasterboard) during installation.

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