Rain Bloc Stormwater Attenuation & Soakaway Crates (300 Litre)

The Rain Bloc Stormwater Crate is a high-performance, modular solution for effective surface water management, perfect for both domestic and heavy commercial applications. Engineered for both soakaway (infiltration) and attenuation (storage) systems, this heavy-duty crate provides exceptional underground water storage with a leading 95% void ratio. Reliable, stackable, and capable of handling up to 60 tonnes of vertical load, the Rain Bloc system is your compliant and robust choice for any Sustainable Urban Drainage System (SuDS) project.

Engineered for High-Capacity & High Traffic

Stop surface water runoff and mitigate flood risk with the Rain Bloc system. During heavy rainfall, these geocellular units collect and store excess water in the created underground void, slowly releasing it into the ground or the drainage network over a sustained period. This process not only safeguards your property but also relieves pressure on public sewer systems.

Key Advantages:

• Exceptional Load Capacity: With a robust vertical load rating of up to 60 tonnes/m², these crates are ideal for installation beneath high-traffic areas, including driveways, car parks, and commercial zones (when installed with the correct cover)

• Maximum Efficiency: The outstanding 95% net void ratio means that for every 300 litres of gross volume, a massive 285 litres is available for water storage, maximising your system capacity within a compact footprint. Only 3.3 crates are required to create a full 1m³ of storage.
• Versatile and Simple Installation: The modular design allows the crates to be stacked up to 10 layers high and configured in various block or row formations to suit your site's specific requirements. They are lightweight (approx. 17-19kg) and come with clips for secure interconnection, making installation quick and efficient without the need for specialist heavy equipment.

Key Specifications and Dimensions

The Rain Bloc Crate must be wrapped in a specific membrane depending on its function:

1. For Soakaway (Infiltration): Wrap the crate system in a permeable Geotextile Membrane (not included) to filter out silt and debris while allowing stored water to soak into the surrounding ground.

   For Attenuation (Storage): Wrap the crate system in an impermeable liner (not included) to create a fully sealed tank, holding the water before it is discharged slowly via an outflow regulato