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Cap - Ø 400 (3-400-090)
Explore the Cap - Ø 400 by National Flues, a premium chimney rain cap built from 316L stainless steel. This product is engineered to meet EN 1856-1 standards and is ideally suited for both commercial and industrial applications. Enhance your flue system with this premium chimney accessory and discover complementary options to complete your installation.
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£278.99
with free delivery
Give us a call if you find it cheaper and we'll try to price match.
At a Glance
Made from high-grade 316L stainless steel
Conforms to EN 1856-1 safety and performance standards
High-pressure sealing gasket (P1/H1) suitable for various pressure systems
Simple push-fit jointing system with secure locking band
Maintains a safe 50mm clearance from combustible materials
Designed for commercial and industrial chimney systems
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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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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.
The Cap - Ø 400 is an essential component for any chimney flue system, providing critical protection against rainwater ingress. This cap is constructed from high-grade 316L stainless steel, ensuring longevity and durability. With a design conforming to EN 1856-1 standards, it is suitable for a wide range of applications, from boilers and ovens to ventilation systems and chimney liners.
The modular SWPro system features a high-pressure sealing gasket (P1/H1) for both positive and negative pressure environments, making it versatile for non-condensing and condensing configurations. The push-fit jointing system, secured with a locking band, allows for straightforward installation while maintaining safety with a 50mm clearance from combustible materials.
SKU: 3-400-090
Technical Specifications
Material
316L Stainless Steel
Standard Conformance
EN 1856-1
System
SWPro
Sealing Gasket
High-pressure (P1/H1)
Installation Design
Push-fit joint with locking band
Clearance
50mm from combustibles
Fuel Compatibility
Not suitable for gas appliances
Warranty
10 Years
• Ensure the flue system is completely cool before installation.
• Fit the high-pressure sealing gasket (P1/H1) on every joint as recommended.
• Use the push-fit jointing system and secure each section with the locking band for a firm assembly.
• Maintain a minimum clearance of 50mm from any combustible material to comply with safety standards.
• If unsure about the installation process, consult a qualified professional to guarantee optimal performance and safety.
The Cap - Ø 400 is constructed from 316L stainless steel, known for its high resistance to corrosion and durability.
No, the Cap - Ø 400 is not suitable for use with gas appliances.
The Cap - Ø 400 conforms to EN 1856-1 standards, with designations ensuring it meets safety and performance regulations.
The cap features a push-fit jointing system secured with a locking band. Gaskets must be fitted on every joint in P1 and H1 installations, and a 50mm distance should be maintained from any combustible material.
Yes, the Cap - Ø 400 is designed for use in both positive and negative pressure systems, suitable for non-condensing and condensing applications.
The high-pressure sealing gasket (P1/H1) ensures a tight seal, making the Cap - Ø 400 effective and reliable for various flue gas pressures.
Yes, due to its high-quality stainless steel construction, the Cap - Ø 400 requires minimal maintenance while offering long-term durability.
Delivery Information +
We work relentlessly to ensure you get your order fast.
Estimated delivery for this product is Thursday, May 1st. Delivery times of products not in our warehouses depend on product availability and shipping. If you need a definitive delivery time give us a call.
If you need faster stove or fireplace delivery please also 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. Mi-Flex offers a lifetime guarantee.
Returns for damaged items are covered by insurance; non-damaged returns incur return delivery costs.
Price Match Guarantee +
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.
Read our review in our Cap - Ø 400 buyers guide
Comprehensive Buyers Guide for the Cap - Ø 400
When selecting the right chimney flue components, quality and safety remain paramount. The Cap - Ø 400 from National Flues represents a significant investment in the longevity and reliability of your chimney flue system. Crafted from 316L stainless steel, this rain cap not only delivers on durability but also ensures compliance with the stringent EN 1856-1 standards.
Overview of the Product
The Cap - Ø 400 is specifically designed to fit 400mm flue systems, offering robust protection against rainwater ingress. Its design incorporates a high-pressure sealing gasket (P1/H1) that is effective under both positive and negative pressure conditions. The push-fit jointing system combined with a secure locking band makes installation straightforward and reliable. Although it is an excellent choice for a range of systems, remember that it is not suitable for gas appliances.
Key Features and Their Benefits
Durable Construction:
• Made from 316L stainless steel, this cap offers exceptional resistance to corrosion, making it a cost-effective choice over its service life.
• Designed to meet EN 1856-1 standards, it guarantees safety and performance in a variety of working conditions, whether it is used with oil-based or other non-gas appliances.
Efficient Sealing:
• The high-pressure sealing gasket (P1/H1) ensures a watertight joint, effectively preventing moisture ingress that can compromise the internal components of your flue.
• Whether your system experiences positive or negative pressure, the gasket maintains integrity, ensuring that your flue remains protected regardless of environmental conditions.
Simple and Secure Installation:
• The cap features a user-friendly push-fit jointing system which, when paired with a locking band, makes the installation process quick and ensures that each connection is secure.
• Following the recommended installation guidelines not only enhances performance but also significantly reduces potential safety hazards, especially by maintaining the mandatory 50mm clearance from combustible materials.
Installation, Maintenance, and Safety
Installation of the Cap - Ø 400 is designed with simplicity in mind, yet it requires attention to detail to ensure longevity and reliable performance. Always start by ensuring the flue has cooled, then carefully fit the sealing gasket on each joint. Use the push-fit system and secure connections with the locking band, keeping in mind to maintain a 50mm clearance from any combustible surface. Routine maintenance is minimal; however, periodic inspections are advised to check that joints remain secure and that no debris compromises the seal.
Addressing Common Objections
Is the Installation Complicated?
Many customers express concern about the ease of installation. We understand that installing components in a flue system can be daunting. However, the intuitive push-fit design of the Cap - Ø 400 allows even those with limited DIY experience to manage the installation easily. For added confidence, professional installers are always available to assist if needed.
What About Compatibility With Other Components?
It’s natural to worry whether your new cap will fit into your existing system. The Cap - Ø 400 is designed for standard 400mm applications, and its modular design allows it to integrate seamlessly with a wide range of flue system accessories. This means that should you wish to expand or upgrade your installation, suitable accessories—such as additional gaskets, flashing kits, or chimney collars—are readily available to complement your investment.
Maintenance and Durability Concerns:
Some buyers may worry about the longevity and upkeep of their chimneys. With a design focus on durability, the Cap - Ø 400 requires minimal maintenance while delivering reliable performance over time. Regular visual inspections and adherence to installation guidelines will ensure that the cap continues to perform optimally for years to come.
Complementary Accessories
To further enhance the performance of your chimney flue system, consider exploring a range of optional accessories. These might include additional sealing gasket kits, flashing accessories, and maintenance tools that are specifically designed to work in tandem with the Cap - Ø 400. By pairing your primary investment with the right additional parts, you can ensure a more robust, efficient, and aesthetically pleasing overall installation. For example, complementary products such as the SWPro system adapters and chimney inlet covers are designed to work seamlessly with your cap, offering you enhanced system performance while maintaining safety standards.
Final Thoughts
The Cap - Ø 400 from National Flues is more than just a component—it is a testament to quality and precision engineering. Its robust construction, adherence to high standards, and versatile installation make it an essential component for any commercial or industrial flue system. If you have any reservations or require further information, our team is always on hand to provide expert guidance. With a focus on both performance and ease of maintenance, the Cap - Ø 400 is an investment in both safety and longevity.
In summary, whether you are installing a new chimney flue system or upgrading an existing one, the Cap - Ø 400 offers reliability, safety, and enduring performance. Take the time to explore additional accessories that might improve your overall system. Remember, the success of your installation can be further enhanced by sourcing high-quality complementary products to ensure every component works in harmony. Our detailed guidance, technical expertise, and dedicated customer service are here to ensure your installation journey is as straightforward and successful as possible.
buy now or call 01670 206 999.
Secure the Cap - Ø 400 today and protect your flue with quality you can trust.
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