Wash water and runoff
How the system switches during washdown
The trigger, delay, valve position and fault response should all be understood by operators and maintenance teams.
01
Start
The wash process or nominated control activates the diversion mode.
02
Divert
Wash water is routed to holding, treatment or the approved contaminated-water pathway.
03
Flush
A set operating or delay period allows residual wash water to clear the collection system.
04
Reset
The drainage returns to its normal state with clear indication of system status.
Information needed
Demand-driven system inputs
These details let us size the equipment and identify questions that should be resolved before pricing or construction.
- Wash equipment and reliable trigger signal
- Drainage layout, pipe sizes and invert levels
- Valve, pump and control-panel location
- Required delay and reset logic
- Power, alarms and fault indication
- Downstream tank, treatment and overflow pathway
Compare options
Automation should make the safe state obvious.
A good design considers power loss, blocked lines, full tanks and operator override. Controls are only useful when the physical drainage and storage system can accept the diverted flow.
| Approach | Best fit | Delivery | Commitment |
|---|---|---|---|
| Manual valve | Low-frequency supervised use | Operator action | Lowest |
| Demand driven | Repeatable active washdown | Wash trigger | Automatic |
| First flush | Rainfall on exposed catchment | Rain event | Automatic |
How we scope and quote
From site details to a quoted wash bay setup
- Send the job detailsVehicles, wash activity, location, photos and water destination.
- We check the wash area and water pathContainment, collection, treatment and routing are reviewed together.
- We price the right equipmentEquipment, options, exclusions and the next information required.
Questions we are regularly asked
Before you request pricing
Final suitability and regulatory requirements remain specific to the site, water authority and proposed discharge or reuse pathway.
What triggers a demand-driven system?
The trigger can be linked to the wash process or another reliable control input. The best method depends on the site’s equipment and operating procedure.
What happens if power fails?
The required safe position and alarm response should be defined during design. It depends on the valve arrangement, site drainage and environmental risk.
Is this the same as first flush?
No. Demand-driven systems respond to active washing, while first-flush systems manage initial rainfall runoff from an exposed catchment.
Can it operate with an oil water separator?
Yes, where oil separation is appropriate, but flow, solids, detergents and storage need to be assessed as a complete treatment train.