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As the aim of the Backflow Prevention Containment Policy is the protection of the system and public health, it is vital that all parties comply with the relevant Acts, Regulations and Standards.

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.

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The water corporation reserves the right to install the appropriate containment device at the relevant property and to take necessary action to recover all associated costs.

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.

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In the event of a property owner refusing to rectify a potential backflow or cross‐connection hazard, the water corporation has the authority to disconnect the reticulated water supply system to the relevant property, in order to protect the system and public health as per Section 141 of the Water Act 1989.

We acknowledge and respect Victorian Traditional Owners as the original custodians of Victoria's land and waters, their unique ability to care for country and deep spiritual connection to it. We honour Elders past and present whose knowledge and wisdom has ensured the continuation of culture and traditional practices. We are committed to being a safe and inclusive workplace for LGBTIQA+ communities and their families.

Medium and high hazard devices need testing annually by a plumber licensed in Backflow Prevention. Results must be lodged within 20 days to either Coliban Water at coliban@coliban.com.au or Coliban Water's agent:

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If you’re a commercial or trade waste customer you must provide a backflow prevention device immediately downstream of your water meter.

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.