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Lid with horizontal drain - Ø 400 (3-400-027)

National Flues presents the Lid with Horizontal Drain - Ø 400; a premium drainage solution engineered for efficient performance in both commercial and domestic flue systems. This high-quality lid, constructed from durable 316L stainless steel, is designed to meet strict EN 1856-1 standards and is CE marked for safety. Ideal for boilers, ovens, and ventilation systems, it is the perfect accessory for ensuring safe, effective drainage in various flue setups. Explore our range of accessories to com Read more...
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At a Glance

    316L stainless steel construction for durability
    1" BSP externally threaded drain connection and cap for efficient drainage
    CE marked and compliant with EN 1856-1 standards
    Modular push-fit jointing system with locking band for secure installation
    Suitable for both condensing and non-condensing operations
    Available for high and low temperature applications
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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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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
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The Lid with horizontal drain - Ø 400 is a critical component in commercial and domestic flue systems. Its design, featuring a 1” BSP stainless steel externally threaded drain connection and cap, ensures efficient drainage at the end of a header or inclined run. Constructed with high-grade 316L stainless steel, this robust lid suits various high-pressure and temperature applications, both non-condensing and condensing.

Its CE marked SWPro modular single wall flue system is ideal for boilers, ovens, ventilation systems, and chimney shafts. With push-fit jointing secured by a locking band and additional jointing gaskets for P1 and H1 installations, it guarantees secure and safe installation.

SKU: 3-400-027

SKU3-400-027
ItemLid with horizontal drain - u00d8 400 u00d8 400
Designation:EN 1856-1: T200 H1 W Vm L50040 O(50) - u00d8 80 up to u00d8 200
EN 1856-1: T200 H1 W Vm L50050 O(50) - u00d8 250 up to u00d8 400
System:SWPro
Inner Material:316L Stainless Steel
Outer Material:N/A
Fuels:Gas, Oil
Approvals:CE
Distance To Combustibles:50mm
Warranty:10 Years
Installation of the Lid with Horizontal Drain - Ø 400 is straightforward when following the recommended guidelines. Begin by ensuring that all surfaces are clean and free from debris. Fit the lid onto the flue system by aligning the push-fit joints, then secure with the provided locking band. For P1 and H1 installations, install the jointing gaskets at every connection point to ensure a reliable seal. Always maintain a minimum clearance of 50mm from combustible materials such as wood or plasterboard. It is advisable to double-check alignment and secure all connections before activating your system. Should any uncertainty arise during installation, consult a certified professional or refer to the complete installation manual available on our website.

This lid is suitable for high and low-temperature applications, including boilers, ovens, ventilation systems, and chimney shafts, in both condensing and non-condensing environments.

The lid is made from high-grade 316L stainless steel, known for its durability and excellent resistance to corrosion.

Yes, the Lid with Horizontal Drain - Ø 400 is CE marked, ensuring it meets the required European standards for safety and performance.

The lid features a modular push-fit jointing system secured with a locking band. For P1 and H1 installations, jointing gaskets must be fitted on every joint.

When installing in environments with combustible materials like wood or plasterboard, ensure a distance of 50mm from the outside of the flue is maintained to ensure safety.

Yes, it is designed to work efficiently under both positive and negative pressure conditions.

It is available in sizes from Ø 80 up to Ø 400, catering to various project requirements.

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