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Commercial Kitchen Backflow Prevention Device Installation

Getting a backflow prevention device installed is a Sydney Water requirement for commercial property owners.

A commercial kitchen owner needed a backflow prevention device installed in Sydney

Nu-Trend is a qualified plumber and licensed Backflow Technician in Sydney that can help commercial property owners ensure their kitchen, restaurant or cafe are compliant with current regulations.

For this commercial kitchen property owner we installed a 50mm Reduced Pressure Zone Device (RPZD) which is a Sydney Water requirement to have a testable Backflow device fitted. The purpose of the device is to protect Sydney Water’s mains from any property deemed to be considered a high hazard. When the device detects backflow or discharge from the property it shuts off. It has to be accessible for annual testing purposes and this is necessary to ensure the valve is working as per its intended use.


For this property the landlord received a letter from Sydney Water asking for the valve to be installed & it had to be done within a certain time period otherwise they would shut the water off to the kitchen.


To get a backflow prevention device installed you must only use licensed plumbers with backflow prevention accreditation issued by a registered training organisation (backflow plumbers) can inspect, commission and test backflow devices. 

Once backflow devices have been installed, only backflow plumbers can test them. Once a test has been done, backflow plumbers must submit the test report to Sydney Water

The type of backflow prevention device you require will depend on your site. The hazard rating of your site’s processes will determine which type of device you need to install. If the hazard rating varies due to multiple processes, you must apply the highest hazard rating.

Reduced pressure zone device (hazard rating – high)
This device has two independent action, non-return valves that are force-loaded to the closed position. A relief valve is positioned between the non-return valves and is arranged to be force-loaded to open to the atmosphere.

Break tank/air gap (hazard rating – high)
This device has an air break (physical gap) between the lowest water service pipe outlet and any upstream tank, fitting or container.

Testable double check valve (hazard rating – medium)
This device has two independent action, non-return valves that are force-loaded to the closed position. It is fitted with three test taps for yearly testing.


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A renovation business that builds new bathrooms to meet Australian Standards.

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Rick and Rob are the hands-on directors for Nu-Trend. Rather than hire sub-contractors and manage their business from a distant office, they are on the tools, at your site & working towards delivering your bathroom renovation or plumbing service. It means you are talking directly to the owners of the business, the guys who are accountable and responsible rather than via email or through customer service teams.

It is why they are able to provide a written guarantee that demonstrates their confidence in standing by the quality of their workmanship and the service they deliver to every single client.

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Nu-Trend has been operating since 2009 as an independent bathroom renovation and plumbing contractor in Sydney. Rick and his team provide a wide range of services for home owners in houses, units, apartments or businesses.

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