Aggregate was selected especially for its free-draining characteristics and structural performance. Provides drainage zone at the base of tree pits to prevent waterlogging in the soil. Also used as backfill material around the perimeter of tree pits to eliminate differential settlement of finished surfaces.
The HydroPlanter drainage stone is a similar, but smaller aggregate, used in the base of HydroPlanter systems.
| Code | Description | Grading |
| DRSTC | Drainage Stone | 10-20mm |
| DRAINA | HydroPlanter Drainage Stone | 4-10mm |
