PSM1A Polystorm Modular Water Storage Unit Soakaway Crate 1000x500x400

PSM1A Polystorm Modular Water Storage Unit Soakaway Crates

• Size: 1000x500x400

Your soil type will determine the efficiency of the soakaway system. This crate has a compressive strengh of 61 tonnes/ m2.We recommend that your groundwork contractor undertakes a percolation test on your soil to calculate the correct number of crates for your application. As a general guide, based on your soil type not being heavy/clay, you can estimate the size of your soakaway using a ratio of 1 crate per 10m2 of surface area that you are draining. However we do advise that the correct tests are carried out prior to you designing your soakaway system.

Features & Benefits: Polypipe PSM1A Polystorm Plastic Soakaway and Attenuation Crate

• Suitable for both attenuation and soakaway systems


• 100% Recyclable and environmentally friendly, made from specially selected and controlled recycled materials


• BBA approved and has undergone stringent testing to ensure product performance


• Compressive strength of 61 tonnes/m2, designed for trafficked and loaded applications


• Flexibility of shape so you can create narrow strips, shallow excavation systems or use in restricted areas


• Lightweight provides excellent health & safety and installation benefits for site


• 3D flow throughout the structure and has a integrated inlet and outlet

What sets this Polystorm Crate apart is its efficient interlocking mechanism. It easily combines with other crates to form a flexible tank beneath a hard surface, effectively storing water redirected from building guttering and surface drains. Its modular design allows specifiers and contractors to create a bespoke subsurface water storage system tailored to the unique demands of their project. This makes it perfect for use in restricted areas, narrow strips or shallow excavation systems.

Each Polystorm unit includes four clips and two shear connectors for straightforward installation.