First Flush Diversion | CleanaWaterGet latest price

The first pass of rainwater over a roof clears away sediment, oils, and other contaminants. Typically, after 10mm of rain falls on a contaminated surface, this surface is deemed 'flushed'.

Water that has been flushed off a roof needs to be treated before it reenters stormwater systems.

Divert rainwater to stormwater

Cleanawater's first flush diversion systems are ideal for uncovered wash down areas over 20 square metres.

First flush diverters will help ensure wash water adheres to water authority standards – so you avoid costly fines and shutdowns. Durable, compact and easily maintained, first flush diverters will help keep your operation water authority-compliant for 20+ years.

How do flush diversion systems work?

Flush diversion systems are fairly complex. Here's how they work in a nutshell:

• Rain begins to fall on a facility and is measured with a rain gauge.
• Rainwater is diverted to a wastewater treatment system until the limit of 10mm is reached.
• The diverter is then shut off, allowing excess rainwater to overflow in stormwater systems.
• If programmed, the diverter can reactivate for insufficient rainfall, or if a wash gun is activated.

Uses and applications

• Wash down bays
• Workshops
• Re-fuelling areas
• Construction sites
• Transformer bunds
• AQIS facilities
• Hire equipment branches

 Benefits of Cleanawater first flush diversion systems

• Minimal excavation required
• Totally automated
• Low-cost
• Eliminate need for roof over wash bay
• Configurable for all sizes of wash pad
• Alarm bolt-ons available
• Ideal for heavy machinery wash pads
• Hassle-free after-sales maintenance programs
• No consumables required
• Life expectancy of 20+ years

Cleanawater's first flush diversion systems are 100% automated. With minimal footprint, they're programmed in-house for wash pads of all sizes.

Ideal for heavy machinery wash pads that can't be roofed, our systems are coupled with oil water separators for complete hydrocarbon management. And we can supply them with optional hydrocarbon spillage alarms to ensure zero stormwater contamination.

Our first flush diversion systems require no consumables. And we can schedule maintenance programs to suit your calendar. It means hassle-free after-sales support. We will also ensure your first flush diverter has a product life expectancy of 20+ years.