Rainwater Soakaway Crate

  • For dispersal of excess rainwater
  • For connection to overflow of rainwater storage tank
  • Modular crates can be freely combined
  • Wrapped in geotextile ready for installation
  • Vehicle-duty capacity
  • Saves wastewater charges


The modular soakaway crates are installed underground to retain and disperse rainwater. They can be joined together to create a system of the required size. A professionally installed system has a load-bearing capacity of up to 600 kN, with each crate offering a storage volume of approximately 600 litres. Prior to installation, the individual crates are wrapped in a high-quality plastic geotextile (type SG29 / 29 Bonar).

It is advisable to prefilter the water through a WISY rainwater filter before it flows into the soakaway. In this case, the soakaway can be installed as a stand-alone system or connected to a rainwater harvesting system.

Various factors need to be taken into account when planning the size of the soakaway system. These include the coefficient of permeability of the ground (see illustration), the size of the roof area connected, the typical volume of rainwater during heavy precipitation in the local area and the groundwater level at the installation site. At your request, we can plan the size of your system in accordance with DWA-A 138 taking all of these
factors into account.

Product details

Material: Polypropylen (PP)
Dimensions: 1800 x 600 x 600 mm
Volume: 615 l
Storage capacity: 95%
Coefficient of permeability: > 63%
Maximum load (see below): 600 kN
Maximum coverage: 240 cm
Connection diameter: 160 mm


Pedestrian duty, installation depth: 15 cm
Passenger car, installation depth: 50 cm

Item number

Modular soakaway crate 600 litres SE 1000