As a leading UK manufacturer of bridge drainage systems, Fowler & Holden is proud to produce the country’s only Kitemark-certified Type-I D400 product. In this blog, we explain what the EN1433 standard involves, why it matters, and how our Fast Flow drainage system meets and exceeds expectations.
What Is EN1433?
EN1433 is a European standard that defines the requirements for linear drainage channels used in pedestrian and vehicular areas. This includes performance under load, water tightness, design safety, and manufacturing standards.
To comply with EN1433, a product must undergo rigorous testing for structural integrity, hydraulic performance, and resistance to temperature and chemicals. It is often required for bridge deck installations, roads, airports, and heavy-duty environments.
Why EN1433 Matters for OEMs and Civil Engineers
If you’re specifying drainage solutions for infrastructure projects, EN1433 certification gives assurance of safety, performance, and compliance. It ensures the drainage system can:
- Withstand heavy loads and traffic vibration.
- Manage high water volumes.
- Maintain long-term durability and corrosion resistance.
- Align with highway and construction regulations.
Non-certified systems risk failure, leading to costly repairs, water damage, or even structural compromise.
D400 Class: What Does It Mean?
EN1433 includes load classifications from A15 (light use) to F900 (airport-grade). D400 is one of the most common and vital classes. It covers products capable of handling loads up to 400kN and is suitable for:
- Roads and motorways.
- Bridge decks.
- Industrial areas.
As a D400 casting supplier, Fowler & Holden provides fully compliant units, ideal for these high-load environments.
FastFlow Drainage: A Certified UK Solution
FastFlow is our proprietary bridge drainage system designed to meet and exceed EN1433 standards. It is the only Type-I system manufactured entirely in the UK to hold the prestigious Kitemark certification.
Key Features of FastFlow Drainage
- D400 Compliant: Certified to handle 400kN loading.
- Type-I Classification: Full system load-bearing.
- Kitemark Certified: Third-party tested and approved.
- Expansion Units: Designed to integrate with bridge movement.
- Bespoke Design: Adaptable to specific deck geometries.
As a trusted supplier of certified drainage solutions, we offer full technical support, drawings, and hydraulic data for specifiers and contractors.
What Is a Type-I Drainage System?
In EN1433, a Type-I system means the grating and frame work together to transfer loads directly to the foundation without relying on the channel walls. This results in a stronger and safer installation – especially important on bridge decks.
FastFlow achieves this by integrating precision-cast iron gratings with robust structural frames and advanced fixings.
Compliance and Quality Assurance
Fowler & Holden products undergo extensive quality checks and third-party testing to ensure consistent compliance. As both foundry and fabricator, we control the entire manufacturing process – from D400 casting to machining to final assembly.
We are:
- A member of the Cast Metals Federation.
- ISO-certified for manufacturing.
- Fully traceable and document-controlled across production.
FAQs
What does EN1433 cover?
It covers performance requirements for linear drainage channels, including strength, durability, and safety.
What’s the difference between Type-I and Type-M systems?
Type-I systems transfer load through the grating and frame, while Type-M systems rely on the channel wall.
Why is D400 important?
It’s the required load class for roads and bridges, ensuring long-term durability under traffic.
Is FastFlow certified?
Yes. It is the only UK-manufactured Type-I D400 system with a Kitemark.
Can FastFlow be used on highways and public infrastructure?
Absolutely. It is fully compliant with highway standards and widely specified across the UK.
Why Engineers Trust Fowler & Holden
Choosing the right drainage system is critical for any infrastructure project. With over a century of experience and a track record of quality, Fowler & Holden offers peace of mind.
Our FastFlow system provides certified drainage solutions that meet EN1433 standards while supporting local UK industry and supply chains. From specification to installation, we are your expert partner.
Contact us Today to discuss your drainage needs:
Call: +44 (0)1472 355 316
Email: admin@fowlerandholden.co.uk
