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Lid - Ø 100 (3-100-036)

National Flues, a trusted name in flue systems and accessories, proudly presents the Lid - Ø 100. Crafted from superior 316L stainless steel, this high-quality cap is designed to seal off flue branches and headers with an innovative Locking Band system. Perfect for both non-condensing and condensing units, this CE marked product complies with EN 1856-1 standards, ensuring reliable performance in gas and oil applications. Upgrade your flue installation with this essential accessory and explore ad Read more...
The price you pay today £27.99
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At a Glance

    Constructed from high-grade 316L stainless steel
    Secure Locking Band design for an airtight seal
    Compatible with both non-condensing and condensing applications
    CE marked and compliant with EN 1856-1 standards
    Suitable for both high and low temperature environments
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, June 24th. 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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Have Questions?
Phone: 01670 206999
Email: [email protected]

The Lid - Ø 100 is an essential component within the SWPro modular single wall flue system. Constructed from high-grade 316L stainless steel, this cap end is designed to close off the branch or base of a tee or the end of a header with secure Locking Band placement. Its robust construction ensures durability and safety, making it suitable for both high and low temperature applications.

The SWPro system, CE marked and compliant with EN 1856-1 standards, supports both positive and negative pressure environments, from boilers to ventilation systems, and is equipped to handle non-condensing and condensing flue gasses.

SKU: 3-100-036

Technical Specifications
Material316L Stainless Steel
SystemSWPro Modular Single Wall Flue
CertificationsCE marked, EN 1856-1 compliant
Fuel CompatibilityGas, Oil
ApplicationSuitable for non-condensing and condensing flue gases
Temperature SuitabilityOperates efficiently in high and low temperature environments
Installation MethodSimple push-fit jointing secured with Locking Band
Minimum Clearance To Combustibles50mm
Warranty10 Years
Installation is straightforward using the SWPro push-fit system. Follow these key steps: 1. Ensure that the branch or base of your tee or header is clean and ready for the cap. 2. Fit the Lid - Ø 100 securely onto the flue end using the provided Locking Band. 3. For P1 and H1 installations, install jointing gaskets at every joint to maintain an airtight seal. 4. Maintain a minimum clearance of 50mm from combustible materials such as wood or plasterboard for safety. 5. It is recommended to consult or hire a qualified installer to verify compliance with local regulations and safety standards.

The Lid - Ø 100 is made from high-grade 316L stainless steel, known for its strength and resistance to corrosion.

This lid serves as a cap end, used to close off the branch or base of a tee or the end of a header in various flue systems.

Yes, the Lid - Ø 100 is designed for both non-condensing and condensing applications with flue gasses in positive and negative pressure.

The SWPro system, including the Lid - Ø 100, is CE marked and compliant with EN 1856-1 standards.

The Lid - Ø 100 is installed using a simple push-fit jointing system, secured together with a Locking Band. In P1 and H1 installations, jointing gaskets must be fitted on every joint.

Ensure a distance of 50mm is maintained from the outside of the flue to any combustible material (e.g., wood, plasterboard).

Yes, the Lid - Ø 100 is suitable for both high and low temperature applications.

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