BACKFLOW Prevention Melbourne
Protecting Melbourne's drinking water supply starts with effective backflow prevention. At Aussie BACKFLOW Testing, we provide professional backflow services across Melbourne, including device installation, annual testing, repairs, servicing, compliance reporting, and water authority lodgements.
Backflow Prevention Services Melbourne
Aussie Backflow Testing provides a complete range of backflow prevention services throughout Melbourne.
BACKFLOW Prevention Across Melbourne
We provide backflow testing, installation and maintence services throughout Melbourne, including:
- Melbourne CBD
- Richmond
- South Yarra
- Hawthorn
- Camberwell
- Kew
- Doncaster
- Ringwood
- Dandenong
- Clayton
- Moorabbin
- Cheltenham
- Frankston
- Sunshine
- Footscray
- Werribee
- Broadmeadows
- Campbellfield
- Somerton
- Northern Suburbs
- Eastern Suburbs
- Western Suburbs
- South Eastern Suburbs
- Bayside Melbourne
Take a look at the areas we service.
What is BACKFLOW Prevention?
Backflow prevention is the process of preventing contaminated water from flowing backwards into the drinking water supply. Under normal operating conditions, water flows in one direction through the water network. However, changes in pressure can cause water to reverse direction, potentially allowing pollutants, chemicals, bacteria, fertilisers, or other contaminants to enter the potable water system.
Backflow can occur through two primary mechanisms:
- Back Pressure: This occurs when the pressure in the system exceeds the pressure of the water supply, causing water to flow backward.
- Back Siphonage: This happens when there is a sudden reduction in the pressure of the water supply system, causing water to be siphoned back into the system from potentially contaminated sources.
Backflow protection devices are specifically designed to stop these situations from contaminating drinking water systems.
Who Needs BACKFLOW Prevention?
Many Melbourne properties are legally required to install and maintain backflow prevention devices.
Properties commonly requiring backflow prevention include:
- Commercial buildings
- Factories and warehouses
- Medical centres and healthcare facilities
- Childcare centres
- Schools and educational facilities
- Restaurants and cafes
- Shopping centres
- Irrigation systems
- Apartment buildings
- Car washes
- Industrial facilities
- Manufacturing plants
- Food processing facilities
- Fire services systems
- Properties with alternative water supplies
If you’re unsure whether your property requires a backflow device, our team can assess your system and provide expert advice.
Types of BACKFLOW Prevention Devices
Several types of backflow devices are commonly used in Victoria, each suited to different levels of risk:
1. Air Gap
An air gap is a physical separation between the water supply outlet and the highest potential water level in a fixture or container. It is the simplest and most effective form of backflow prevention. Air gaps are commonly used in sinks, basins, and tanks.
2. Double Check Valve Assembly (DCVA)
This device consists of two independent check valves arranged in series. It is used in situations where there is a low to medium risk of contamination, such as in residential properties.
3. Reduced Pressure Zone Device (RPZD)
An RPZD provides the highest level of protection against backflow. It consists of two check valves with a pressure differential relief valve between them. RPZDs are typically used in high-risk situations, such as in industrial or commercial properties where hazardous substances are present.
4. Pressure Vacuum Breaker (PVB)
A PVB is used to prevent back siphonage. It includes a check valve and an air inlet valve that opens to break the vacuum when the water supply pressure drops. PVBs are often used in irrigation systems.
Melbourne BACKFLOW Compliance Requirements
Backflow prevention requirements in Melbourne are governed by water authorities and Australian plumbing standards.
Property owners are responsible for ensuring that:
- Appropriate backflow prevention devices are installed.
- Devices are tested annually where required.
- Testing is completed by an accredited backflow tester.
- Devices remain operational and compliant.
- Testing reports are submitted to the relevant authority when required.
Failure to maintain compliance can result in enforcement action and increased risk to public health.
We regularly work with Melbourne’s major water authorities, including:
- Yarra Valley Water
- South East Water
- Greater Western Water
- Melbourne Water
Our team understands the reporting requirements for each authority and can assist with the entire compliance process.
Our BACKFLOW Testing Process
We make compliance simple and straightforward.
1. Preparation
- Notification: Inform property owners or occupants about the testing schedule to minimize disruptions.
- Inspection: Visual inspection of the backflow prevention device for any visible signs of damage or wear.
2. Shut-off
- Close Valves: Turn off the water supply upstream and downstream of the backflow preventer to isolate the device.
- Drain Water: Drain any water from the test ports of the backflow prevention device.
3. Test Setup
- Attach Test Kit: Connect a differential pressure gauge or test kit to the test ports of the device. The test kit measures the pressure differences across the check valves and relief valves.
- Open Test Valves: Open the test cocks on the backflow preventer to allow water into the test kit.
4. Performing the Test
- Check Valve Test: Measure the pressure drop across each check valve to ensure they are holding tight against backflow. Each check valve must maintain a specific minimum pressure differential.
- Relief Valve Test (for RPZ assemblies): Check the operation of the relief valve by creating a differential pressure condition that should cause the relief valve to open and discharge water.
- Air Inlet Valve Test (for AVB and PVB): Ensure the air inlet valve opens to break the vacuum and prevent back siphonage.
5. Recording Results
- Document Findings: Record the test results, including pressure readings, device condition, and any repairs or adjustments made.
- Pass/Fail: Determine if the device passes or fails based on the readings and manufacturer specifications.
6. Restoration
- Reassemble Device: Reassemble the device if any components were removed for testing.
- Restore Water Supply: Turn the water supply back on and check for any leaks or issues.
- Verify Operation: Ensure that the backflow prevention device is operating correctly after the test.
7. Reporting
- Provide Report: Generate a detailed report of the testing results, including any corrective actions taken, and provide it to the property owner and relevant authorities.
- Certificate: Issue a certification of compliance if the device passes the test.
Why Choose Aussie BACKFLOW
100% Compliance with your local water utility.
Fixed Price Testing Solutions.
Free annual reminders and inspections.
All our work is fully guaranteed.
Backflow Prevention Melbourne
Frequently Asked Questions
Is backflow prevention mandatory in Melbourne?
Many commercial, industrial, and certain residential properties are required to have backflow prevention devices installed and maintained in accordance with local water authority requirements.
How often does a backflow device need testing?
Most registered backflow devices require annual testing by an accredited tester.
Who can test a backflow prevention device?
Testing must generally be carried out by an accredited backflow prevention tester.
What happens if my backflow prevention device fails a test?
If your device fails a test, it means the device is not functioning as intended and could allow contaminants to enter the potable water supply. In this case, the device must be repaired or replaced immediately by a licensed plumber. After repairs, the device should be retested to confirm it is working properly. Failure to address a failed device can result in penalties, including fines or water supply disconnection
What is the difference between an RPZ and a DCVA?
An RPZ provides a higher level of protection and is typically used in high hazard applications, while a DCVA is commonly used for lower hazard situations.
How much does backflow testing cost?
Costs vary depending on the type of device, location, and access requirements. Contact us for a quotation.
Do residential properties require backflow prevention?
Some residential properties require backflow prevention devices, particularly where irrigation systems, alternative water supplies, or other cross-connection risks exist.
Do irrigation systems require backflow prevention?
Many irrigation systems require backflow prevention to protect the drinking water supply from contamination.
Which water authority receives the testing report?
This depends on the property’s location and servicing authority. We can advise and submit reports where required.
Can a failed backflow device be repaired?
In many cases, yes. We can assess the condition of the device and recommend the most cost-effective solution.
We service all the major water suppliers and are Accredited Backflow Prevention Testers.
