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Backflow Prevention Testing

Looking for backflow prevention, testing or installation?

Pure Plumbing Professionals is a prominent backflow prevention company that services the Sydney Metropolitan area. We supply, install and test backflow prevention devices across multiple industries such as hospitality, healthcare, strata, and commercial as well as domestic applications.

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What is backflow and backflow prevention?

The term backflow refers to the reverse flow of unwanted contaminated water that makes its way into the main water supply from either a residential or commercial system. This contaminated water will contaminate the main supply if contact between the two is made.

Backflow prevention is the device that is installed to stop the cross-contamination from occurring by not allowing the contaminated water to head back into the main supply.

Our backflow prevention services

When it comes to backflow prevention our expert plumbers have not only had extensive training but also vast experience in installing, maintaining and repairing backflow prevention devices.

Our services include:

  • Supply and installation
  • Testing and certification
  • Valve protection / vandal deterrents
  • Maintenance and repairs
  • Audits and reports

Methods of backflow prevention

Depending on your needs our backflow prevention methods can vary. We are accredited and highly experienced in backflow prevention device installation and can assist you with the best methods of backflow prevention for your job. Our main backflow prevention methods include:

  • Air gaps
  • Break tanks
  • Double check valves
  • Reduced pressure zone device
  • Pressure vacuum breaker
  • Single check valve (testable)
  • Double check valve detector assembly
  • Reduced pressure zone detector assembly
  • Single check valve detector assembly

Who needs backflow testing?

Pure Plumbing Professionals can take care of all your testing and certification requirements. All testable backflow prevention devices are required to be tested and certified annually. We can also lodge testing documentation with the relevant local water authority. We also perform any maintenance or repair work as needed. Properties that may require backflow testing include:

  • Restaurants
  • Shops
  • Unit and apartment complexes
  • Medical and dental facilities
  • Swimming pools
  • Residential properties
  • Caravan parks
  • Production/manufacturing facilities
  • Piers, docks, and waterfront facilities

Hazard rating of sources

The hazard rating of the source of contamination will determine the kind of backflow prevention device required. For instance, a hose tap located in a rubbish bin washing bay on a commercial or industrial property has a high hazard rating, therefore an RPZ backflow device will be needed. On the other hand, a residential property with an underground rainwater tank connected to the water supply has a medium hazard rating so it will require a double check valve.

We are able to advise you on the required backflow prevention device depending on your particular hazard rating. Devices for protection from potential contamination sources are:

  • Irrigation systems
  • Vehicle washing bays
  • Fire hose reels
  • Fire systems
  • Cooling towers
  • Grease traps
  • Rubbish bin washing bays
  • Chlorinators
  • Underground rainwater tanks

How is the hazard rating decided?

Below is a snippet from the AS-NZS 3500-1 Section 4.3: Cross-Connection Hazard Rating

Cross-connections are rated using three degrees of hazard:
High Harzard: Any condition, device or practice that, in connection with the water supply system, has the potential to cause death.
Medium Hazard: Any condition, device or practice that, in connection with the water supply system, has the potential to endanger health.
Low Hazard: Any condition, device or practice that, in connection with the water supply systems, constitutes a nuisance but does not endanger health or cause injury.

Commercial plumbing services

When you need a plumbing contractor that understands the specific needs of your property, you need not look any further than the commercial plumbing experts at Pure Plumbing Professionals. Contact our team on 0407 837 729 or complete our booking request form today.



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Pure Plumbing Professionals Reviews


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4 Stars 1
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See what our clients are saying about our plumbers

  • Cassandra whitfield from
    Services: Blocked Drains

    Just a note to acknowledge the amazing service provided to us recently by Jeremy and his team. Following on from the unfortunate experience of a blocked sewerage pipe we were informed by another company that we required a boundary trap replacement and, accordingly, were provided with a quote of i...

  • Graeme jones from
    Services: Blocked Drains, Services: Emergency Plumber

    Was not having a Good Friday with a seriously blocked drain problem. Called Pure Plumbing and extremely pleased with the service provided. In the first instance the public holiday call out fee was much more reasonable than others we had called. The plumber arrived within an hour - and even called...

  • Greg hill from
    Services: Plumber, Services: Hot Water

    Thank you for your fast service fixing our leaking shower taps.

  • Gregg from
    Services: Plumber, Services: Hot Water

    Perfect. Thank you once again for all of your great work. The attention to details and quality of craftsmanship shows in your work. I’m truly grateful that you guys are my plumbing team.

  • Heather from
    Services: Plumber

    Hi Jerram A massive thank you for sending Michael to fix our toilet and main bathroom taps - it is a huge change to have working plumbing!!! Can’t thank you guys enough. Have a great day Heather 😊

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