- BS EN 13285
- 0/20mm unbound mixture.
- Improves drainage within soil and around pipes and drains.
Filter
Media
Specialist Drainage Materials for Flood Prevention & Water Management
At RedRox, we supply a comprehensive range of high-performance filter media and drainage aggregates used in critical filtration, separation, and water management applications across England, Scotland, and Wales. All materials are tested and compliant with Series 500 and Series 600 specifications, supporting the delivery of durable, efficient, and sustainable drainage infrastructure.
With climate change increasing the frequency of surface water flooding and stormwater overload, the correct selection of drainage aggregate is essential for long-term system performance and resilience.
Why Filter Media Matters
With the growing effects of climate change, including heavier rainfall and rising flood risk, effective drainage has never been more important. Using the correct filter media:
- Promotes water infiltration and flow
- Prevents clogging and siltation of drainage systems
- Supports sustainable urban drainage systems (SuDS)
- Reduces pressure on sewers and surface water systems
- Protects infrastructure, embankments, and groundwater
Incorrect or poorly graded materials can compromise system performance, lead to flooding, or cause premature failure of drainage installations.
Filter Media Products We Supply
We offer filter media in a variety of standard grades, each with specific drainage properties and compliant with Series 500 and Series 600 specifications:
Type A
Type B
- Graded and single sized aggregate
- Type B is the most commonly used in sub-soil drainage systems
Type C
- BS EN 13285
- Ideal for narrow trenches, geotextile systems, and sensitive drainage
- Highways & road drainage
- Utilities & cable trenches
- Retaining wall backfill
- SuDS & land drainage
- Stormwater soakaways & flood defence
Need help choosing the right filter grade?
Contact RedRox for technical advice, fast quotes, and nationwide delivery.
