Backflow poses a serious threat to public health. It can contaminate drinking water, leading to illness or even death in extreme cases. Think of chemicals from an irrigation system, pathogens from stagnant water in fire sprinkler pipes, or cleaning solvents from an industrial process – if these enter the tap water supply via backflow, the consequences can be severe. According to Barwon Water, backflow contamination “can pollute our shared water supply, and cause severe illness, injury, or fatalities.”

In addition to health risks, there are liability and legal implications. If backflow from your property causes harm to others or the water network, you (as the property owner or tenant in control) may be held liable for damages. This means you could face lawsuits or penalties if negligence in preventing backflow leads to contamination.