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Lid with drain - Ø 500 (3-500-037)

National Flues presents the Lid with Drain - Ø 500, a premium component designed for modern SWPro flue systems. Made from durable 316L stainless steel, this flue lid ensures reliable drainage, superior safety, and efficient operation for boilers, ovens, and ventilation systems. Explore our range of accessories to complement your installation and experience the best in chimney flue solutions.
The price you pay today £290.99
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At a Glance

    Constructed from high-grade 316L Stainless Steel
    Features a high-pressure sealing gasket (P1/H1) for secure joints
    CE marked and compliant with EN 1856-1 standards
    Designed for both high and low-temperature applications
    Incorporates a stainless steel BSP connection for efficient drainage
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, June 10th. 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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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 Lid with drain - Ø 500 is a versatile component within the SWPro single wall flue system. Constructed from 316L stainless steel, it features a high-pressure sealing gasket (P1/H1) and is suitable for both high and low-temperature environments. This universal flue system handles both non-condensing and condensing applications in positive and negative pressure settings.

Perfect for boilers, ovens, ventilation systems, and chimney shaft liners, the SWPro's construction varies in thickness depending on the flue diameter, ensuring optimal durability. CE marked and compliant with EN 1856-1 standards, the SWPro system offers a modular design with a push-fit jointing system secured by a Locking Band. For P1 and H1 installations, jointing gaskets must be fitted at every joint, and a minimum distance of 50mm from any combustible material is mandatory.

SKU: 3-500-037

Technical Specifications
SKU3-500-037
Material316L Stainless Steel
GasketHigh-pressure sealing (P1/H1)
ConnectionStainless Steel BSP
ComplianceCE Marked, EN 1856-1
ApplicationNon-condensing and condensing, positive and negative pressure systems
Minimum Distance To Combustibles50mm
Warranty10 Years
SystemSWPro modular design with push-fit jointing and Locking Band
The Lid with Drain - Ø 500 is installed at the bottom of a vertical flue run, typically positioned under a tee section. Ensure that jointing gaskets are fitted at every connection for P1 and H1 installations and maintain a minimum of 50mm clearance from combustible materials. It is recommended to verify that all connections are secure and that the stainless steel BSP fitting is properly attached to the drainage pipework. Regular inspections and adherence to the manufacturer's guidelines will contribute to a safe and efficient installation. Optional accessories, such as additional drain pipes or jointing gasket sets, are available to enhance and customize your flue system.

The Lid with Drain - Ø 500 is constructed from high-grade 316L stainless steel, ensuring durability and resistance to corrosion.

Yes, the Lid with Drain - Ø 500 is CE marked and complies with EN 1856-1 standards.

The SWPro system is ideal for boilers, ovens, ventilation systems, and as a chimney shaft liner. It can handle both high and low-temperature, non-condensing, and condensing applications in positive and negative pressure settings.

The SWPro system features a modular design with a push-fit jointing system, secured by a Locking Band. For P1 and H1 installations, jointing gaskets must be fitted on every joint, and a distance of 50mm from any combustible material must be maintained.

The Lid with Drain - Ø 500 is available in various diameters, specifically designed to fit within the SWPro system. The construction thickness varies depending on the diameter to ensure optimal performance.

The stainless steel BSP connection on the Lid with Drain - Ø 500 allows for seamless connection to drainage pipework, facilitating efficient removal of any condensates or moisture within the flue system.

While the SWPro system is designed for durability and reliability, it is recommended to inspect and maintain it periodically to ensure optimal performance and longevity.

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