How much does an RPZ Valve Cost?
How much does RPZ Valve Testing in Sydney Cost?
How can you get an RPZ Test Report?
How much does RPZ Valve Installation Cost?
Does RPZ Plumbing have to be changed?
What are the RPZ Valve Servicing Requirements?
What is RPZ Testing?
How can you install a RPZ Backflow Preventer?
Nu-Trend is a qualified Plumber and licensed Backflow Technician that can help commercial property owners ensure their kitchen, restaurant or cafe are compliant with current regulations.
We were called to a site because the owner of the restaurant received a letter from Sydney Water to install a Backflow Test Device for the property. It is compulsory for a restaurant, laundromat or hospital to have this device installed. These type of commercial working areas are classified as high hazard which requires a high hazard Backflow device such as an RPZD needs to be installed.
This valve protects the Sydney Water mains from any back charge that may occur in the line in the rare case of disinfectants, cleaners, oils or grease are syphoned from the property, kitchen or grease trap areas during cleaning or maintenance.
The valve has two testable check valves, which close when they sense a Backflow in water pressure. It also has a vent on the bottom which expels any residual water in the valve when this occurs, meaning the valve is more suitable outside, but can be installed indoors with a tub dish drain beneath the vent.
On inspection of this property we found one valve needed to be installed on the main water meter. Another two valves needed to be installed on the two hose taps closest to the grease trap, as these taps would be considered high hazard because they could be used for cleaning during maintenance of the grease trap.
The valves will need to be tested annually to ensure the check valves and vent are in working order.
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.
READ OUR FREE GUIDE

How to avoid Sydney Plumber sales gimmicks
We uncover some of the most common sales gimmicks used by Sydney plumbers. Learn about our ‘No Gimmicks’ Guarantee.
Local | Licensed | Insured
Nu-Trend is a plumber and bathroom renovations team in Sydney, available 7 days a week. With 15 years experience, the Directors Rob and Rick are hands-on and provide a personalised service that is fully licensed, insured and qualified. You can check online with the NSW Department of Fair Trading here
Work with a local Sydney renovator.
FULLY LICENCED 217859C
A qualified and licensed builder.
INSURED $20,000,000
Public liability insurance for peace of mind.
Drainer | Gasfitter | Plumber | LP Gasfitter
Kitchen, Bathroom and Laundry Renovator
STANDARDS AUSTRALIA AS/NZS3500:2018 Compliant
All the work carried out by Nu-Trend is AS/NZ3500:2018 compliant. It is the Australian Standard for Plumbing and Drainage in NSW as set down by Standards Australia and the Australian Building Codes Board. They give the plumbing industry technical direction to enable compliance with required regulatory frameworks.
The Nu-Trend service guarantee
A personal, written, committment.
Rick and Rob are the hands-on Directors for Nu-Trend Plumbing. 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.
They have a very single minded commitment to deliver a high level of professionalism and quality.

'No Gimmicks' that's our policy
No sales tricks, guaranteed.
With so many years in the trade, the Nu-Trend team has seen their fair share of sales tricks, special offers, promotions and other gimmicks to secure business. Rather than copy what everyone else is doing they decided a long time ago to avoid all the typical gimmicks and stick to clear, upfront information and pricing, including the provision of free Quotes.
Here are the most common sales gimmicks you will see and how they work, keep in mind there is a reason most service industries don’t disclose fixed prices.
Nu-Trend at work
Real examples, real jobs.
Rather than use lots of photos copied from Google or from bathroom suppliers the Nu-Trend team shares real life examples of their work. Take a look at some of the bathroom renovations or local plumber jobs they have done around Sydney.

Marble Look Bathroom Renovation in Sylvania
A bathroom renovation using marble look porcelain tiles with walk in shower, toilet and vanity.

Ensuite Bathroom Renovation Designed by Boffi
Every inch of this ensuite bathroom was a mastermind design from Boffi that had no expense spared.

Unit Small Bathroom Renovation in Gymea
We changed the floor plan of this small bathroom in Gymea unit and moved the toilet, shower and vanity to create a more open space.
Years of Plumbing experience
Nu-Trend since 2009
Nu-Trend was formed just over 10 years ago by father and son team, Rick and Michael Karagiannis.
Michael has been in the industry for more than 20 years, passing his knowledge and expertise to Rick as the family tradition lives on.
Rick has always enjoyed the finer elements design details. Not content with solving plumbing problems he soon broadened his skills to also do bathroom renovations in Sydney. A perfect match with hundreds of reviews later & beautiful bathrooms being enjoyed by hundreds of people.