Some properties will need a device on their main water meter to help prevent backflow. Here's how to assess and prevent backflow from your property.
What is backflow?
Backflow happens when water from a property is drawn back into the water system, affecting the community's drinking supply.
Backflow can happen when:
there is a break in the water main which supplies your property
water is pumped from the main water supply during a fire
you are using water at a higher pressure
there is high water demand from the main water system.
Some properties will need a device on their main water meter to help prevent backflow.
Assessing backflow risk
We'll assess your backflow risk and tell you if you need a backflow prevention device when you apply for a property connection.
Backflow prevention devices are required on medium and high-risk properties like commercial and industrial properties or residential properties with a bidet, toilet douche or below ground rain water tank.
After installation, your plumber needs to test your backflow prevention device. You are also legally responsible for arranging an annual test of your device by a licensed plumber.
You must send us your completed inspection and maintenance form within 14 days of testing. If you don't submit the form within 14 days, we may need to arrange a licensed contractor to do another test, at your cost.
If you do not install and maintain your device, you risk serious injury or death. You could also be liable for injury or product liability claims, litigation, penalties or damages caused to nearby premises.