Backflow Testing Brisbane

At S&J Plumbing and Gasfitting, we provide regulation backflow testing and full reporting to ensure your backflow prevention device is operating as it should.

Our Backflow Testing & Prevention Services

Regular maintenance and testing of backflow prevention systems is required for many residents in Brisbane and throughout the state of Queensland. This is to prevent dangerous situations in which water supplies become contaminated with chemicals, sewage, and other hazardous foreign contaminants. At S&J, we offer both installation of backflow prevention devices and ongoing maintenance and testing.

Backflow Prevention

At S&J Plumbing and Gasfitting, we supply, install, and maintain backflow prevention devices for your plumbing system. The devices we work with include both testable and non-testable devices; which type is right for your property will depend on your contamination risk level. If your property requires a backflow prevention device, or if you already have one installed, the S&J team is here to help ensure your water supply is kept safe.

Backflow Testing 

Local governments within Queensland mandate regular backflow testing and reporting for those with testable backflow prevention devices, including the Brisbane City Council. Our backflow maintenance services include regular testing that meets government standards and ensures your backflow prevention device is protecting your water supply. We issue a full report providing proof of completed testing.

What Is Backflow and How Does It Occur?

Backflow occurs when water flows from a property’s mains plumbing network back into the main supply, potentially poisoning the water supply for other users. Backflow is typically caused by one of two situations:


Occurs when the pressure in the mains supply drops significantly. This may happen due to a leak or a draw that significantly reduces the flow of water, such as a fire hydrant being used upstream.


Occurs when the pressure within a property’s plumbing network exceeds the pressure of the water supply from the mains.

The Importance of Backflow Prevention

When backflow occurs, it can lead to contaminated drinking water, a highly dangerous situation. Depending on the source, backflow may cause people to become sick or nauseous, infected with diseases, or much worse. A backflow prevention device is a one-way valve that prevents water from re-entering the main water supply once it has entered a property’s plumbing network. 

Backflow is most concerning in properties that have plant equipment or similar connected to the water supply. Other common reasons to include a backflow prevention device into your plumbing network include:

  • An irrigation system

  • Fire hose reels or fire hydrants

  • Commercial or industrial equipment or activities that could pollute the drinking water supply (air conditioning cooling towers, chemical cleaning areas, etc.)

  • Water outlets in proximity to pollutants, grease traps, or chemicals

  • An alternate water supply

If you’re unsure whether your property needs a backflow prevention device, it’s best to consult with a plumbing professional.

What we do

More of Our Services



S&J Plumbing and Gasfitting provides a full range of professional plumbing services, from solving existing residential or commercial plumbing issues to installing the necessary systems in your new home.


Hot Water Systems

S&J Plumbing and Gasfitting offer a complete range of hot water services including repairs, replacement and service of all types of hot water systems.


Gas Fitting

If you suspect a gas leak or need to install a new gas appliance, don't DIY it. All gas services need to be done by a licenced gasfitters Brisbane wide.


Blocked Drain + CCTV Pipe Inspection

At S&J Plumbing and Gasfitting, we use the latest in CCTV Drain Camera Technology to investigate problems with your plumbing.


Toilet Repairs

With over 20 years of plumbing experience, the team at S&J Plumbing knows exactly how to diagnose, assess, and fix any problems that arise with the household throne.


Burst Water Pipes

S&J Plumbing and Gasfitting has years of experience in the plumbing industry, including repairing and replacing broken water pipes.


Commercial Plumbing

Whether it be emergency callouts, installations or maintenance programs, our commercial plumbers have the skills, experience and equipment to attend to your requirements.

We service Brisbane and all surrounding suburbs

The team at S&J Plumbing and Gasfitting are locally-owned and based in Brisbane, servicing all surrounding suburbs.

Call S&J for Your Backflow Testing and Prevention Needs!

As a contractor based in Brisbane, S&J Plumbing and Gasfitting is the go-to local expert for backflow prevention and testing that meets the regulatory standards of local councils. With more than 20 years of industry experience, we understand how to install, repair, and maintain these critical devices, as well as how to thoroughly test them to ensure they’re keeping your water supply clean and safe.

Whether you need backflow testing or a new backflow prevention device installed, call S&J right away! We respond fast and get the job done right, each and every time.
What makes us Different

Why Choose S&J Plumbing?

Local Business

S&J Plumbing and Gasfitting are a locally-owned Brisbane-based business with more than 20 years experience in the industry. 

Master Plumbers

All of our plumbers are members of the Master Plumbers Association of Queensland. Add to that over 20 years experience in the plumbing industry and you can be sure you are getting the best service in Brisbane.

Hot Water Specialists

Our experience plumbers are experts in all hot water systems and have not come across an issue they couldn't fix.

Blocked Drain Specialists

Blocked drains are a common nuisance when it comes to plumbing systems. At S&J Plumbing and Gasfitting, we have the knowledge, experience and equipment to clear an drain to ensure you have free-flowing plumbing system.

24hr Service

Plumbing issues don't care if it is 10am in the morning or 11pm at night, and sometimes those issues need to be fixed ASAP. The team at S&J Plumbing and Gasfitting are available 24 hours a day, 7 days a week. Contact Us today.

Honest Upfront Pricing

There are no hidden fees when it comes to working with S&J Plumbing and Gasfitting. All of hour work is priced up front and if issues arise that were not expected, we work with you to get the best possible outcome.

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Need A Backflow Test? Contact S&J Plumbing and Gasfitting Today!

At S&J Plumbing and Gasfitting, we know the importance of regulatory compliance to ensure your business experiences minimal downtime. We are familiar with state and local government testing and reporting requirements in southeast Queensland. To ensure your business remains operational, contact us for scheduling your annual inspections as part of our plumbing maintenance plans. Call today for more information.

"I needed a plumber on short notice on the weekend. James arrived quickly and detected the problem and addressed it in a very professional manner. he was very focused in his work and the result was outstanding. Thank you James."

Gabriela Arrais

"These guys were prompt when we called them with no hot water and a blocked drain. They were reliable, honest and took pride in their business. I called 5 local plumbers and they were the only ones who picked up and then made space for us as we needed urgent help. And in the following days, only one of the other plumbers called back. I was very impressed with their work and will definitely be going back to them with any future plumbing needs. Thank you for everything!"

Grace Funston

Backflow Testing & Prevention FAQs

Why is backflow testing needed?

Backflow prevention is a matter of public health, and testing helps to ensure prevention devices are operating properly. The implications of a failing backflow prevention device are severe as this can leave you, your loved ones, tenants, or the general public—depending on the type of building—at risk of consuming contaminated water.

How often must backflow preventers be tested?

In Brisbane and most localities within Queensland, testable backflow prevention devices must be tested at least once every 12 months. Written proof of testing must be provided to the local council.

What if a backflow test fails?

Failure may be a result of damage or poor maintenance. A backflow prevention device may need to be cleaned or otherwise serviced before the testing can be done again. In some cases, the device may need to be fully replaced.

Contact us.

Friendly, fast & professional plumbing services across Brisbane’s North, South & Western Suburbs.