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First Flush Water Diverters

First Flush Water Diverters improve water quality and reduce tank maintenance by preventing the first flush of rainwater, which may contain roof contaminants, from entering the tank.

Choose a first flush diverter to suit your needs

Downpipe Diverters
Downpipe Diverters

6 Products

Commercial Diverters
Commercial Diverters

4 Products

In-Ground Diverters
In-Ground Diverters

4 Products

Post/Wall Diverters
Post/Wall Diverters

4 Products

Clean Rain Head-Diverters
Clean Rain Head-Diverters


Note: Water diverted should be a minimum of 20 litres per 100 square metres of roof area (or 0.2L per m2).

Shop for First Flush Water Diverters

225mm First Flush Delta Commercial (WDCL22)225mm First Flush Delta Commercial (WDCL22) - specifications]

225mm First Flush Delta Commercial Diverter

Price $699.95 GST incl.
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Rain Harvesting 90mm Downpipe First Flush Water DiverterRain Harvesting 90mm Downpipe First Flush Water Diverter

90mm Downpipe First Flush Water Diverter

Price $50.00 GST incl.
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Rain Harvesting 100mm Downpipe First Flush Water DiverterDownpipe First Flush Diverter Dimensions

100mm Downpipe First Flush Water Diverter

Price $70.00 GST incl.
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100mm First Flush Advanced Downpipe Diverter (WDDP20)First Flush Advanced Release Valve

100mm First Flush Advanced Downpipe Water Diverter

Price $130.00 GST incl.
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90mm First Flush Advanced w/ Max Chamber Upgrade KitFirst Flush Advanced Release Valve

90mm First Flush Advanced with Max Chamber Upgrade Kit

Price $130.00 GST incl.
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150mm Delta Commercial Kit

100mm First Flush Delta In-Ground Diverter

Price $250.00 GST incl.
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100mm First Flush Delta Post/Wall-100mm (WDPW10)150mm Delta Commercial Kit

100mm First Flush Delta Post/Wall Diverter

Price $310.00 GST incl.
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150mm Delta Commercial First Flush Diverter

150mm First Flush Delta Commercial Diverter

Price $360.00 GST incl.
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Rain Harvesting 300mm In-Ground First Flush Water DiverterRain Harvesting 300mm In-Ground First Flush Water Diverter

300mm In-Ground First Flush Water Diverter

Price $197.00 GST incl.
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Rain Harvesting 300mm Post/Wall Mounted First Flush Water DiverterRain Harvesting 300mm Post/Wall Mounted First Flush Water Diverter

300mm Post/Wall Mounted First Flush Water Diverter

Price $205.00 – $315.00 GST incl.
More Info🛒 Order This product has multiple variants. The options may be chosen on the product page
First Flush Advanced Release Valve (WDRV01)First Flush Advanced Release Valve

First Flush Advanced Release Valve

Price $65.00 GST incl.
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Wet-Dry Valve Kit (DRYV01)

Wet-Dry Valve Kit

Price $75.00 GST incl.
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† Every care is taken to ensure that the information on this website is accurate at the time of publishing. Unfortunately, errors can occur, and information may also change over time. As such, before acting on any information found on this website please either first confirm it with us in writing or use at your own risk.