RainBloc 300L Storm Soakaway Crate

Reliable Stormwater Attenuation For High-Load Applications

The RainBloc 300L is a heavy-duty soakaway crate designed to manage surface water by allowing it to drain into the ground efficiently. Made by Graf, it's ideal for use beneath car parks, driveways, and other trafficked areas.

Key Features

• Effective flood management - Stores up to 300 litres of stormwater per crate, reducing surface runoff and helping prevent flooding and waterlogging.

• Versatile water control - Suitable for infiltration, retention, or attenuation setups when wrapped in a geotextile membrane.

• Strong and durable - Supports up to 45 tonnes/m² vertically and 15 tonnes/m² laterally suitable for cars, vans, and HGVs.

• Made from recycled materials - Produced in the UK from recycled polyethylene and certified to ISO 9001 quality standards.

• Simple, scalable installation - Modular crate system is easy to install in single or multiple units. Ideal for residential and commercial applications.

Optional Geotextile Membrane

If you choose the geotextile membrane option, we supply pre-cut sheets based on crate quantity:

• 1 crate: 2.25m x 3m (6.75m²)

• 3 crates: 2.25m x 6m (13.5m²)

• 6 crates: 2.25m x 8m (18m²)

This helps streamline installation while ensuring proper water filtration and soil separation.

Technical Specifications

• Dimensions: 1200mm (L) x 600mm (W) x 420mm (H)

• Gross volume: 300L

• Net volume: 285L

• Void ratio: 95%

• Weight: 17kg per crate

• Vertical loading capacity: 45 tonnes/m²

• Lateral loading capacity: 15 tonnes/m²

• Inspectable: No

• Material: Recycled polyethylene

• Colour: Black

• Made in: UK

Installation Considerations

• Suitable for landscaped areas and trafficked zones up to 40 tonnes.

• Minimum cover depth varies from 0.3m (landscaped areas) to 1.1m (HGV loads).

• Maximum installation depth depends on soil type, ranging from 4.25m to 6.75m.

Always consult a qualified engineer for site-specific calculations.