Drainage Gravel (20mm) - Pre Bagged

A robust, 20 mm crushed blue-metal gravel — this size is excellent for larger-scale drainage needs like retaining wall catchment, high-flow trenches, and load-bearing pathways.

Key Features

• Angular 20 mm crushed blue-metal for excellent load-bearing and drainage.

• Great erosion resistance, even in high-flow areas.

• Helps divert water efficiently while remaining stable under compaction.

Ideal Uses

• Trench drainage behind retaining structures

• Heavy-duty runoff or stormwater applications

• Paved or unpaved drainage paths

Availability

• 26 L bags (pre-bagged)

• Store pick-up or delivery across Brisbane