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Lid - Ø 400 (3-400-036)

Discover the Lid - Ø 400 from National Flues – a premium accessory meticulously engineered for the SWPro modular single wall flue system. Manufactured in robust 316L stainless steel and CE marked to strict EN 1856-1 standards, this lid is synonymous with quality, reliability, and safety. Ideal for both residential and commercial settings, the Lid - Ø 400 excellently seals off branches and headers in flue systems, making it a must-have for boilers, ovens, and ventilation systems.
The price you pay today £156.99
including free delivery Give us a call if you find it cheaper and we'll normally price match.

 

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At a Glance

    Constructed from high-grade 316L stainless steel for superior durability and resistance to corrosion
    CE marked and EN 1856-1 compliant ensuring the highest safety standards
    Designed for high and low temperature flue systems in both non-condensing and condensing applications
    Features a user-friendly push-fit jointing system with a secure Locking Band for an effortless installation
    Equipped with a high-pressure sealing gasket (P1/H1) for a reliable, leak-proof finish
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.

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.

We Won't Be Beaten On Price

At National Flues, we continuously monitor competitor prices. This ensures that we consistently offer you the best deals on all our products. Here’s how we keep your costs low:

  • Daily Price Matching: Our team adjusts prices to ensure we stay competitive.
  • Bulk Purchasing Power: We sell a lot, so we can negotiate better rates with suppliers, passing the savings directly to you.
  • Operational Efficiency: We have streamlined processes to reduce overhead.

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

Free Delivery Over £100: Orders over £100 are free delivery (call us if delivery is required outside the mainland UK).

“I saved 20% on my purchase compared to other retailers. Exceptional service!” – Jane D.

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

The Lid - Ø 400 is an essential component of the SWPro modular single wall flue system. Crafted from 316 grade stainless steel, this high-quality end cap ensures secure closure for flue systems in both high and low temperature environments. Perfectly suited for boilers, ovens, ventilation systems, and as a chimney shaft liner, this lid comes with a high-pressure sealing gasket rated P1/H1, making it ideal for non-condensing and condensing applications.

Featuring a user-friendly push-fit jointing system secured with a Locking Band, the SWPro system guarantees easy and efficient installation. Additionally, it's CE marked and compliant with EN 1856-1 designations, offering reliability and peace of mind. Keep a safe distance of 50mm from any combustible materials during installation.

SKU: 3-400-036

Technical Specifications
Material316L Stainless Steel
Diameter400 mm
CertificationCE Marked (EN 1856-1 compliant)
Sealing GasketHigh-pressure (P1/H1)
Fuel CompatibilityGas, Oil
ApplicationsBoilers, ovens, ventilation systems, chimney shaft liners
Warranty10 Years
Safety Clearance50 mm from combustible materials
Installation is straightforward with our intuitive push-fit jointing system and a secure Locking Band mechanism. Ensure that you maintain a minimum distance of 50mm from any combustible materials during installation. Always consult the installation manual for detailed guidelines. Additionally, if you require optional accessories—such as extra sealing gaskets, adapter collars, or other flue system components—visit our accessories section to complement your main installation for an optimised, tailor-made solution.

The Lid - Ø 400 is crafted from high-grade 316L stainless steel, ensuring durability and long-lasting performance.

Yes, the Lid - Ø 400 is CE marked and complies with EN 1856-1 standards, ensuring safety and quality.

The SWPro flue system is versatile, suitable for high and low temperature environments, non-condensing and condensing applications, and is ideal for boilers, ovens, ventilation systems, and as a chimney shaft liner.

The lid uses a push-fit jointing system, secured with a Locking Band. Make sure you maintain a 50mm distance from combustible materials.

As the name suggests, the lid has a diameter of 400mm, making it suitable for larger flue systems.

Yes, the Lid - Ø 400 is equipped with a high-pressure sealing gasket rated P1/H1, ensuring a secure and tight fit.

Absolutely, this component is perfect for both residential and commercial applications due to its robust construction and versatile design.

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