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Backflow Prevention

Proximity Plumbing have been providing Sydney Eastern Suburbs locals with backflow prevention solutions for over 10 years. 

Are You Interested In A Backflow Prevention Estimate?

backflow prevention expert team

What is Backflow Prevention?

Backflow occurs when water that has been contaminated or exposed to the atmosphere makes its way into the domestic water supply of a property. The water that we drink at home has been through a process that removes any dangerous chemicals, bugs, etc. There are times, however, where that supply can become compromised, resulting in contaminated water making its way to our taps.

Typically, backflow happens as a result of ‘siphonage’. Siphonage occurs in scenarios where there is a build-up of pressure at a given source, greater than the pressure in the pipes. Some of the common places that we see potential backflow risks are:


  • Car washing bays.
  • Swimming pool areas where a hose can reach the pool.
  • Garbage areas where a hose is used to wash out bins.
  • Mechanical and service rooms.
  • Commercial Restaurants.


Areas such as these present potential ‘backflow hazards’, meaning that procedures need to be put in place to ensure that your family or office is not unknowingly at risk. There is an array of products that are designed to suit specific scenarios, so your best bet is to give us a call today so that we can make sure that we’re offering you the right solution.


We’re fully licensed and certified to repair and maintain backflow devices such as ‘RPZD’s’, ‘Check Valves’ and ‘Double Check Valves’. We offer friendly, professional service and full compliance certification.

Which backflow device should you install?

The type of device that should be installed depends on the hazard rating of the processes carried out at the property.

The three hazard ratings identified by AS/NZS 3500:1 are:

  • High hazard – any conditions, device or practice that are connected to the water supply system and have the potential to cause death.
  • Medium hazard – any conditions, device or practice which in connection with the water supply system could endanger health.
  • Low hazard – any conditions, device or practice which in connection with the water supply system would constitute a nuisance but not endanger health.

Residential, commercial and industrial properties that have been categorised as a medium or high hazard (and low hazard above 25mm) are required to have an approved, testable backflow prevention device installed at the outlet of the water meter.

If the process at property changes and the hazard rating is increased, the property owner must have a licenced and backflow accredited plumber certify the change in hazard rating and inform Hunter Water. A high hazard rated site containment backflow prevention device may be required to be installed.

How Does Backflow Occur?

Backflow can occur if:

  • a break in a water main causes water supply system pressure to drop
  • a large volume of water pumped from the water main during a fire, causes water supply system pressure to drop
  • a pump connected to your system or high pressure from your system causes a reverse flow.

All premises must comply to current Australian Standards for backflow prevention.

Easterns Suburbs Leading Backflow Prevention Specialists

We understand that our clients need quick, convenient and cost effective solutions when it comes to backflow prevention. If you suspect that you are having a problem with a leak, but can’t detect the source then let our highly experienced master plumbers fix the issue for you. 


Proximity Plumbing clients can rest assured knowing that our team of highly skilled and qualified plumbers are dedicated to providing the best possible service. 

At Proximity, we ensure that our quotes and estimates are as accurate as possible so you can be sure that you have a full understanding of costs before we arrive. 

Our Plumbing repairs and processes have been designed to be cost effective and provide our clients with real solutions to plumbing problems. 

We understand that when you need a plumber you want to be dealing with highly trained and skilled expert to quickly solve your plumbing problems. With a team of over 10 plumbers, you can be sure that when you choose Proximity Plumbing, you are dealing with the best. 

We believe that investing in the best equipment means that we will be able to provide our clients with the best and most cost effective plumbing services possible. Our industry leading backflow prevention solutions and equipment helps us to ensure your property is protected. 

The Proximity Plumbing Difference

Leaks in your home or office can not only cost you hundreds of dollars in wasted water, but can also cause significant damage if left unattended. At Proximity we promise to provide our clients with an industry leading service and ensure that: 

  • Our master plumbers go through continuous and rigorous training to ensure you always receive the best service and advice.
  • We treat all of our customers and their properties as if they were our own. 
  • We arrive on time and provide quick and convenient services so you can resolve the issue quickly and get back to life. 
  • We deliver quick and accurate Backflow Prevention services and minimise the level damage required to complete the repair. 
  • We always clean up at job completion and leave your home or office as we found it.

Why 97% of customers refer us to family and friends

  • Our friendly staff will call you to make a booking on your desired day and time.
  • We offer a two-hour window, so you’re not waiting around all day.
  • Our tradesmen will call you 30 minutes before arrival to introduce themselves, so you are aware whom to expect on arrival.
  • All tradesmen arrive in clean, sign-written vehicles and are dressed in smart, branded Proximity Plumbing uniform so they are easy to identify.
  • Tradesmen will first introduce themselves and take off their work boots off to ensure your home is kept tidy.
  • They will then inspect the issue and provide advice, suggestions and a solution.
  • You’re in control - if you're happy with the price provided, our plumbers will start immediately.
  • If you're not happy with a proposal, there is no obligation and no callout fee required for our time and advice.
  • On completion, we offer all clients a complimentary home inspection to ensure no hidden surprises in future, along with Proximity Plumbing’s handy tips & hints.
  • As we are transparent, we request all new clients to provide their honest feedback on a Google review so others can read before contacting us.
  • Our office staff will follow up after the job is completed, to ensure that everything is working properly, we will also do a scheduled 6-month call to ensure all is working 100% as it should and to touch base for any questions or concerns.
  • Before accepting payment, the office will call you directly to ensure you're happy with the service and overall experience.

Expect The Best With Proximity Plumbing

1. Quality Every Time

Tradesmen will first introduce themselves and take off their work boots off to ensure your home is kept respected and tidy.


All of our team go through regular, mandatory and self-development training, not only within the company but through our service partners


With 25 combined years’ experience, we can deal with any issue - from a dripping tap to a burst pipe within a wall cavity.


All tradesmen show a clear line of communication and respect to all clients, from the moment we receive your call until the job is complete.


We value our customers and communicate with them every step of the way. We are upfront with pricing and there are no hidden charges.


Just have a look at what our happy customers have said about us on Google - put us to the test!


We’re so confident in our ability to deliver results that we offer a service guarantee on all our work.


As a standard, we can be relied upon to take care of your plumbing Emergency as we are on call 24/7


Many of our jobs are based on a set price, so we can give you an accurate quote for the job very quickly.

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Strata Plumbing Eastern Suburbs

I have found Proximity Plumbing to be diligent, highly organised and demonstrate exceptional follow-up skills

Matt Marano
Property Manager

Proximity Plumbing during an Emergency responded within 20 mins. As they are truly local they can deliver on a premium service

Jo Larkin
Local Bondi Resident

5 years of exceptional service, reliability and transparancy

Jonathan Carr
Senior Property Manager

Lightning fast to get my place and fix a bathroom nightmare that two order plumbers couldn't. Can't recommend them highly enough.

Dee Dee
Local Rosebay Resident

William has been remarkable in attending to all jobs allocated to him in swift timeframe, including any Emergency jobs required.

Jemma Radocaj
Strata Manager

Proximity Plumbing was recomended to us and we can without hesitation do so as well. They look the stress out of plumbing for us.

Brenden Purcell
Real estate Agent

Proximity Plumbing consistently offers a great service, both in times of crisis and general maintenance.

Adam Schwartz

Will and his team are a breath of fresh air in an industy flooded with cowboys. A pleasure to work with such a professional outfit, putting their customers first and proiding a reliable service

Asset Manager