Automated washdown diversion systems prevent contaminated wash water from entering the stormwater network during vehicle, equipment and plant washing. Using demand-driven hydraulic control or programmable first flush logic, these systems automatically divert wash water to trade waste or holding tanks – then return normal stormwater flow during rain events. Trade Enviro supplies fully automated solutions for outdoor wash bays, workshops, mining sites and high-risk industrial applications.
Trusted by industrial operators across Australia
DD600 Automated Washdown Diversion System
Best for controlled wash bays that can be cleaned after each wash
What it does
- Detects washdown activity via demand valve
- Automatically diverts wash water to trade waste
- Returns flow to stormwater when washing stops
Key points
- No pumps or electronics required
- Installed in a 600 × 600 poly pit
- Two outlets: stormwater + trade waste
- Removable silt basket for gross pollutant capture
Typical applications
- Truck and equipment wash bays
- Workshops and depots
- Quarantine and mining facilities
How the DD600 Works
- Rain events discharge normally to stormwater
- Wash tap opened → demand valve sends hydraulic signal
- Diversion valve opens → wash water diverted
- Tap closed → valve returns to stormwater mode
FF600 First Flush Diversion System
Best for large wash areas that can’t be fully cleaned after each wash
What makes it different
- PLC-controlled first flush diversion
- Captures initial contaminated runoff during rain
- Still includes demand-driven washdown diversion
First flush capability
- Programmable up to 2000L
- Typical compliance: 10–15mm rainfall equivalent
- Example: 300m² area × 10mm = 300L captured
System configuration
- Stainless steel control cabinet
- Plate-mounted valves for higher flows
- Suitable for large industrial sites
Need Guidance?
Speak with our team for clear, practical advice before making a decision.
- Unsure which option suits your site conditions
- Need confirmation before purchasing or installing
- Want clear, compliance-focused advice
No obligation • Compliance-focused advice tailored to your site
DD600 vs FF600 – Which Do I Need?
| Requirement | DD600 | FF600 |
|---|---|---|
| Wash area cleaned after use | ✅ | ❌ |
| Large exposed wash area | ❌ | ✅ |
| First flush compliance required | ❌ | ✅ |
| PLC control | ❌ | ✅ |
| Simpler install | ✅ | ❌ |
Installation
- Pit must be concreted in place
- Minimum 100kPa water pressure for demand valve
- Licensed plumber required
- Electrician required for FF600 PLC systems
- Often paired with treatment systems for closed-loop compliance
FAQs
Is an automated washdown diversion system expensive?
Automated washdown diversion systems are typically used when ongoing pump-outs, wash mats or manual containment become costly or impractical. While there is an upfront installation cost, ongoing operating and maintenance costs are generally lower than repeated waste collection and temporary containment solutions.
How often do washdown diversion systems need servicing?
Automated washdown diversion systems include valves, silt baskets and control components that require routine inspection and servicing. Servicing frequency depends on site conditions, wash frequency and regulatory requirements.
Do I need a DD600 or a first flush FF600 system?
The DD600 is suited to wash bays where the area can be cleaned after each washdown, allowing wash water to be diverted only when washing occurs. The FF600 is designed for larger or exposed wash areas where residual contamination may remain, requiring a programmed first flush diversion during rainfall events.
Can these systems connect to trade waste or holding tanks?
Yes. Automated washdown diversion systems are designed to divert wash water and contaminated runoff to trade waste connections or holding tanks, depending on site design and treatment requirements.