Installation is just the first step. Because backflow devices contain mechanical parts (check valves and relief valves) that can wear out over time, they require annual testing.
| Device | Best for | Maintenance | |--------|----------|-------------| | Double Check Valve (DCV) | Homes with pools, standard irrigation | Test annually | | Reduced Pressure Zone Device (RPZD) | Farms, commercial sites, high hazard | Test annually, inspect monthly | | Pressure Vacuum Breaker (PVB) | Above-ground irrigation only | Not permitted for mains connection in NSW |
Under the NSW Health Act 2010 and Sydney Water Backflow Prevention Policy , all properties with a hazard rating must have a tested, operational backflow device. backflow installation bringelly
Backflow occurs when pressure changes cause used or contaminated water to flow backward into the drinking water system. Without a properly installed and maintained prevention device, your water could be contaminated with chemicals, fertilizers, bacteria, or other toxins.
Types of backflow preventers: which one does your home need? Installation is just the first step
The danger lies in contamination. Without a prevention device, fertilizers from irrigation systems, chemicals from industrial processes, or stagnant water from rainwater tanks can be siphoned back into the public drinking water supply, posing serious health risks to the community.
This usually happens due to:
A qualified technician will inspect your Bringelly property to identify hazards and determine the correct device type (such as a Reduced Pressure Zone Device or a Double Check Valve) based on the risk level.
Once installed, the device must be tested immediately. In New South Wales, the plumber must provide a certificate of compliance to Sydney Water and the local council, confirming the device operates within the required standards. Backflow occurs when pressure changes cause used or
Many rural properties automatically qualify as High Hazard due to chemical storage or agricultural activity.