Backflow Prevention Brisbane

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Regular reporting of maintenance of your backflow prevention device is required by local governments in Queensland to ensure compliance. At S&J Plumbing and Gasfitting, we supply, install, maintain and test backflow prevention devices. There are testable and non-testable backflow prevention devices and which one is fitted to your network will depend on the contamination risk level of your property. If your property requires or already has a backflow prevention device, get in touch with us today.

What is Backflow and How Does it Occur?

Mains water is designed to be supplied under pressure to a property. Backflow occurs when water flows from a property’s mains plumbing network flows back into the mains supply and potentially poisons the water supply for other users. A backflow prevention device is a one-way valve that prevents water from re-entering the mains water supply once it has entered a property’s plumbing network. This can occur in one of two ways:

  • Back siphonage – occurs when the pressure in the mains supply drops due to a leak or a draw that significantly reduces the flow of water, such as a fire hydrant being used upstream.
  • Backpressure – this occurs when the pressure within a property’s plumbing network exceeds the pressure of the water supply.
This is most concerning in properties that have plant equipment or similar connected to the water supply. Other 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

Without a backflow prevention device, there is a risk of chemicals, sewerage or other foreign contaminants entering the water supply.

Backflow Testing

We provide regulation testing along with a report that is suitable for providing to your local council. For example, in Brisbane, the Brisbane City Council requires all backflow prevention devices that are testable to be checked annually.

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 Fittings

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 licensed gasfitter


Blocked Drain + CCTV Drain Cameras

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


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.


Broken Water Pipes

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


Commercial Solutions

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.

What makes us Different

Why Choose Us?

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

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