Backflow is the reverse flow of a liquid into the drinking water supply.
Backflow from an industrial or commercial property that uses harmful substances could pollute the local water supply.
For example, a hose left running in a container of toxic chemicals could result in harmful backflow. A sudden drop in water pressure could cause the liquid to be siphoned back through the hose and into the water supply.
The installation of a backflow prevention device protects the water supply from this very serious situation.
Commercial and trade waste customers
If you’re a commercial or trade waste customer you must provide a backflow prevention device immediately downstream of your water meter.
Without a backflow prevention device, you risk:
- causing serious illness or death
- prosecution under the Water Act 1989
- substantial financial losses and litigation (such as Workcover, and Occupation Health and Safety claims)
- being disconnected from the water supply.
Installing a device
It's the property owner's responsibility to make sure that a suitable backflow device is properly installed and tested. Only plumbers with a Water Supply license are qualified to install a device.
Here's what you need to do:
1. Get a risk assessment
The hazard ratings are:
- High hazard - potential to cause death.
- Medium hazard - potential to endanger health.
- Low hazard - constitute a nuisance but not endanger health.
2. Choose and install a device
Your accredited plumber will recommend and install a suitable device based on your property's hazard rating. If installing a device in a medium or high hazard area, your plumber must be licensed in Backflow Prevention.
3. Test your device
Medium and high hazard devices need testing annually by a plumber licensed in Backflow Prevention. Results must be lodged within 28 days to either Coliban Water or Coliban Water's agent:
CIS Services Pty Ltd
4 Florence Street Burwood VIC 3125
Last updated on 21 Feb 2023