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Horizontal pipe with drain - Ø 125 (3-125-025)

National Flues presents the SWPro Horizontal Pipe with Drain Ø 125, a highly efficient modular flue pipe crafted from superior 316L stainless steel. Engineered for both condensing and non-condensing applications, this flue component meets EN1856-1 standards and is CE marked, ensuring uncompromised safety and durability. Ideal for integration in boilers, ovens, and ventilation systems, it represents a top choice when seeking reliable chimney and flue system accessories. Explore our range of optio Read more...
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At a Glance

    Constructed from high-grade 316L stainless steel
    CE marked and compliant with EN 1856-1
    Designed for both high and low temperature applications
    Versatile for boilers, ovens, ventilation systems, and chimney shaft liners
    Easy push-fit jointing system with secure locking band
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 Horizontal pipe with drain - Ø 125 is part of the versatile and high-performing SWPro modular single wall flue system. Constructed from high-grade 316L stainless steel, it features a high-pressure sealing gasket (P1/H1) and excels in various applications. This pipe is designed for both high and low-temperature environments, suitable for non-condensing and condensing applications with flue gases in both positive and negative pressures.

It is perfect for boilers, ovens, ventilation systems, and as a chimney shaft liner. The SWPro system is CE marked, meeting EN 1856-1 standards, and offers easy installation through a push-fit jointing system secured with a locking band. Joint gaskets must be used on every joint in P1 and H1 installations.

It is important to maintain a 50mm distance from any combustible material (wood, plasterboard). Available in different thicknesses depending on the diameter, this flue component ensures safety and efficiency.

SKU: 3-125-025

Technical Specifications
SKU3-125-025
Diameteru00d8 125
Material316L Stainless Steel
CertificationCE, EN1856-1
Operating TemperaturesHigh & Low
Installation MethodPush-fit jointing with locking band
Clearance Requirement50mm from combustible materials
Warranty10 Years
ApplicationsBoilers, ovens, ventilation systems, chimney shaft liners
SystemSWPro Modular Flue System
Ensure joint gaskets are used on every connection in both P1 and H1 installations. Maintain a minimum 50mm clearance from combustible materials such as wood or plasterboard. Follow the push-fit jointing procedure and secure all joints with the provided locking band to guarantee a safe and efficient installation. Always refer to the manufacturer’s instructions for any specialised installation scenarios.

The SWPro Horizontal Pipe with Drain is made of high-grade 316L stainless steel, ensuring durability and long-lasting performance.

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

The SWPro system is CE marked and conforms to EN 1856-1 standards.

The SWPro pipe features a push-fit jointing system secured with a locking band. Joint gaskets must be used on every joint in P1 and H1 installations.

A 50mm distance from any combustible material such as wood or plasterboard must be maintained.

The system supports high-pressure (P1) and low-pressure (H1) applications, handling both positive and negative pressures.

Yes, the SWPro pipe is suitable for both condensing and non-condensing applications.

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