Polystorm 190L Storm Soakaway Crate by Polypipe

High-capacity Soakaway Crate For SuDS-Compliant Drainage

The Polystorm 190L Soakaway Crate is designed for managing surface water in areas with high traffic or heavy loading. It offers reliable performance for infiltration, attenuation, and retention systems, and can be installed under a wide range of surfaces. Each crate is manufactured from 100% recycled material and meets SuDS best practice guidelines.

Key Features

• High load bearing – Tested up to 440kN/m² vertical strength (approx. 44 tonnes/m²)

• Versatile use – Suitable for infiltration, attenuation, or retention systems

• Traffic-ready – Certified for use under car parks and other trafficked areas

• Modular design – Easily stackable and connectable for flexible layout options

• Efficient water flow – 3D structure and 95% void ratio for maximum storage

• Inspection-ready – Compatible with Polystorm Access & Inspect units

• Sustainable choice – Made from recycled materials, fully recyclable

Typical Applications

• Car parks

• Commercial and residential developments

• Driveways and access roads

• Sustainable drainage schemes (SuDS)

Optional: Geotextile Wrap

Add-on option includes a cut-to-size piece of 100gsm NW8 non-woven geotextile membrane, supplied per bundle:

• 1 crate: 2.25 × 2.0m (4.5m²)

• 3 crates: 2.25 × 3.5m (7.87m²)

• 6 crates: 2.25 × 5.5m (12.37m²)

Technical Specifications

• Dimensions: 1000mm (L) × 500mm (W) × 400mm (H)

• Unit weight: approx. 9kg

• Storage volume: 190 litres (0.19m³)

• Void ratio: 95%

• Vertical strength (short-term): 440kN/m²

• Lateral strength (short-term): 63kN/m²

• Max burial depth: 3.7m (light-trafficked), 3.8m (non-trafficked)

• Service life: 50 years (creep-limited)

Pack Sizes

Available as individual crates or in multi-pack options:

• 1 Crate (190L)

• 3 Crates (570L)

• 6 Crates (1140L)

Each can be supplied with or without pre-cut geotextile wrap.

Installation Overview

1. Excavate to required depth; ensure level base with no groundwater

2. Lay geomembrane or geotextile to suit application (infiltration or attenuation)

3. Assemble and place crates using supplied connectors

4. Backfill evenly using suitable granular fill

5. Cap with membrane layer before reinstating surface