Polystorm 190L Storm Soakaway Crate by Polypipe

Compact Modular Soakaway Crate For SuDS-Compliant Drainage

The Polystorm PSM1A is a high-performance 190L modular soakaway crate developed by Polypipe for sustainable surface water management. Designed for both attenuation and infiltration systems, it’s ideal for installations under trafficked areas, such as driveways, access roads, and car parks. The crate is manufactured from 100% recycled materials and forms part of a fully BBA-approved SuDS system.

Key Features

• Strong and reliable – Vertical compressive strength of 440kN/m² (approx. 44 tonnes/m²)

• Modular and scalable – Stackable for custom layout designs and adaptable tank volumes

• SuDS-compliant – Ideal for soakaway and attenuation solutions

• Built for traffic loads – Suitable for installation under loaded surfaces and vehicular access

• Sustainable – Made from recycled plastic and fully recyclable at end of life

• Inspection-ready – Compatible with Polystorm Access and Inspect components

• 50-year lifespan – Designed to meet long-term performance requirements under load

Common Applications

• Car parks and service yards

• Driveways and residential roads

• Commercial building drainage

• Housing developments

• SuDS infiltration and attenuation systems

Optional Geotextile Wrap (100gsm NW8)

Add-on option includes cut-to-size geotextile fleece, 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

• Product Code: PSM1A

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

• Unit Weight: Approx. 9kg

• Storage Volume: 190 litres (0.19m³)

• Void Ratio: 95%

• Vertical Strength: 440kN/m²

• Lateral Strength: 63kN/m²

• Max Burial Depth: 3.7m (light-trafficked), 3.8m (non-trafficked)

• Material: 100% recycled polypropylene

• Service Life: 50 years (creep-limited)

• Certification: BBA Approved (Cert No. 06/4297)

• Fittings Included: 4 clips and 2 shear connectors per unit

Available Pack Sizes

• 1 Crate – 190L

• 3 Crates – 570L

• 6 Crates – 1140L

Each pack is available with or without the optional pre-cut geotextile wrap.

Installation Overview

1. Excavate to depth and prepare a flat, compacted base

2. Wrap base and sides in membrane (geomembrane or geotextile depending on system)

3. Assemble crates and interconnect using provided clips and connectors

4. Backfill evenly with clean granular fill

5. Cover with membrane (if required) and reinstate surface

FAQs

What does the product code PSM1A mean?

PSM1A identifies this model as a traffic-rated Polystorm crate with enhanced recycled material content, certified to 44 tonnes/m² compressive strength.

Is it suitable for deep installation?

Yes, the PSM1A can be buried up to 3.7m (light-traffic) or 3.8m (non-traffic), subject to ground conditions.

How many crates do I need per cubic metre?

Five crates give you approximately 0.95m³ of storage, allowing for air gaps and configuration.

Can I mix with other Polystorm crates?

Yes. PSM1A can be used in hybrid systems with Polystorm Lite and Polystorm Xtra for cost efficiency and strength distribution.

Is a geotextile membrane necessary?

Yes, for infiltration systems use NW8 fleece. For attenuation (sealed tanks), use an impermeable geomembrane with protection fleece.