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Backflow is the reversal of the normal directional flow of water within a plumbing system. This can occur when the pressure in the delivery main drops below the pressure in the internal plumbing system, leading to backflow [back siphonage]. Such situations may arise due to a ruptured water main or during periods of excessive water demand. Backflow can also occur if a water pump, like a bore pump, is cross-connected to the internal water plumbing system and operates at a higher pressure than the water main. These conditions can cause potentially polluted water to enter your drinking water supply, posing serious health risks.


Backflow incidents themselves can be serious, and without the installation of authorised backflow prevention devices, you could face significant penalties. Brisbane City Council mandates that backflow prevention devices must be installed by licensed plumbers and undergo annual testing. The results of these tests must be formally reported to the relevant department to ensure compliance with local regulations.
At Alexander Gas & Plumbing Co., we specialise in comprehensive backflow prevention services in Brisbane. Our team of licensed plumbers is equipped to install high-quality backflow prevention devices and conduct mandatory annual testing. We handle all aspects of compliance reporting to the appropriate authorities, relieving you of the administrative burden.
Installation of Backflow Prevention Devices: We install top-quality devices that meet all regulatory standards to protect your water supply from contamination.
Annual Testing and Maintenance: Our licensed plumbers perform the mandatory annual testing required by Brisbane City Council, ensuring your devices are functioning correctly and your water supply remains safe.
Compliance Reporting: We take care of all formal reporting to ensure you remain compliant with local regulations, providing you with peace of mind.
Rest assured, Alexander Gas & Plumbing Co. can handle your backflow prevention needs with our prompt and professional backflow prevention services. Contact us on 0404 823184 to schedule an appointment or to learn more about our backflow prevention solutions in Brisbane.






Backflow prevention is the process of stopping contaminated water from flowing backward into the clean water supply. This is crucial for maintaining the safety and quality of our drinking water in Brisbane. Backflow can occur due to changes in water pressure, causing pollutants and contaminants to enter the potable water system. Alexander Gas & Plumbing Co in Brisbane offers expert backflow prevention services to ensure your water supply remains safe and uncontaminated. Read more on our blog here.
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Backflow detection and prevention devices should be installed by licensed professionals to ensure compliance with safety standards and regulations. Alexander Gas & Plumbing Co in Brisbane has extensive experience installing, testing and servicing backflow prevention devices. Our skilled technicians are fully licensed and equipped with the latest tools and technology to provide reliable and efficient installation services to all locations in Brisbane and surrounds.
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To ensure your backflow prevention device functions properly and remains compliant with regulations, it is essential to have it serviced regularly by a qualified professional. Alexander Gas & Plumbing Co offers comprehensive servicing for backflow prevention devices in Brisbane and surrounding locations. Our experienced team can perform routine maintenance, testing, and repairs to keep your system in optimal condition.
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Backflow prevention devices are essential for properties where there is a risk of water contamination, such as commercial buildings, industrial sites, and residential properties with irrigation systems, swimming pools, or secondary water supplies. If you own or manage a property in Brisbane, it’s important to have a backflow prevention device installed to protect your water supply. Alexander Gas & Plumbing Co specialises in installing these devices to safeguard your property and comply with local regulations. For safe and professional installation contact us for a quotation on 0404 823 414 or email us here
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Yes, it is mandatory to have regular backflow detection testing in Brisbane. Local regulations require annual testing of backflow prevention devices to ensure they are functioning correctly and effectively preventing contamination. Alexander Gas & Plumbing Co offers professional backflow testing services in Brisbane and surrounding areas, ensuring your system meets all legal requirements and operates efficiently.
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The Plumbing and Drainage Regulation 2019 s102 requires owners of devices to have them tested at least once a year by a licensed person.
All registered devices must be tested by the end of each calendar year.
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