Backflow occurs when water flows backwards from the drainage system into the water supply system. This water has the potential to carry contaminants that can harm the health of your household and community.
Backflow is more likely to occur if:
- there’s a drop in pressure in the main, eg during a main break or
- water pressure at the property is higher than at the main (eg if a pump is operating on the site)
Backflow prevention devices ensure that the water supply isn’t contaminated from hazards from your property. This device stops the waters ability to flow back into the water main.