EnviroCrate 40-10 400L Storm Soakaway Crate

The EnviroCrate 40-10 is a modular underground stormwater storage and soakaway crate designed for attenuation, infiltration and water reuse systems. Manufactured in the UK from recycled polypropylene, it provides reliable structural performance while delivering high water storage efficiency in SuDS compliant installations.

Each crate provides 400 litres of storage with a 95 percent void ratio, allowing significant water retention while minimising excavation volume. The 1 m x 1 m footprint makes the system quick to configure into tanks of almost any shape, whether for domestic driveways, commercial car parks, service yards, landscaped areas or developments with restricted space.

EnviroCrate 40-10 is suitable for infiltration soakaways when wrapped in a permeable non woven geotextile membrane. This prevents fines migration from surrounding soils while allowing controlled discharge into the ground. For attenuation or water storage systems, the crates should be encapsulated in an impermeable geomembrane with a geotextile protection fleece.

The system is rated for trafficked applications, including HGV traffic, provided minimum cover depths are achieved and suitable backfill is used. Typical installations include roof drainage attenuation tanks, soakaways beneath driveways, access roads, car parks and areas where conventional stone soakaways are impractical.

Limitations should be considered early. Maximum burial depth is 4.0 m from finished ground level to base of the system. Reduced cover or weak clay soils may require design checks, and infiltration performance will depend on ground permeability.

• 400 litre storage capacity per crate with high void ratio
• Suitable for pedestrian, vehicle and HGV trafficked areas
• Modular 1 m x 1 m format for flexible tank layouts
• Lightweight units reduce manual handling on site
• Manufactured in the UK from recycled polypropylene
• Compatible with infiltration or attenuation systems

Manufactured from recycled polypropylene. This provides long term resistance to chemicals, groundwater and biological attack while maintaining structural integrity under load.

Product Name: EnviroCrate 40-10
Crate Dimensions: 1000 mm x 1000 mm x 400 mm
Storage Capacity: 400 litres
Crates per cubic metre: 2.5
Unit Weight: 21 kg
Void Ratio: 95 percent
Compressive Strength: 240 kN/m²
Lateral Strength: 100 kN/m²
Maximum Depth to Base: 4000 mm
Manufacturing Standard: ISO 9001
Material: Recycled polypropylene
Origin: UK manufactured

Geotextile Membrane Option (Single Sheet Supply)

Non woven needle punched geotextile membrane
Supplied as one pre cut sheet per order, sized to fully wrap the total number of crates purchased
Designed to cover base, sides and top for standard infiltration installations

Typical sheet sizes supplied

1 crate: one sheet, 4.5 m² (2.25 m x 2.0 m)
3 crates: one sheet, 7.87 m² (2.25 m x 3.5 m)
6 crates: one sheet, 12.37 m² (2.25 m x 5.5 m)