Backflow Prevention in Cairns

Protecting Your Water Supply

Backflow prevention plays an important role in keeping drinking water safe, especially where there is a risk of contamination entering the system. A backflow prevention device is designed to stop polluted water from flowing back into the clean water supply through cross-connections.


Across Cairns, these systems are used to protect potable water in environments where contamination risks are higher. Our team at Dunnerite Plumbing installs and services backflow prevention devices, ensuring each system is set up correctly and continues to operate as it should.


Call 0439 643 970 to organise backflow prevention services.

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Frequently Asked Questions

  • When is a backflow prevention device required?

    Backflow prevention devices are typically required in properties where there is a higher risk of contaminated water entering the main supply. This often includes commercial sites such as schools, hospitals, restaurants and healthcare facilities where strict safety requirements apply.

  • Do all properties need backflow prevention?

    Not all properties require a backflow prevention device, but it is often mandatory in commercial or high-risk environments. Requirements depend on the type of property, water usage and potential contamination risks within the system.

  • How does a backflow prevention device work?

    A backflow prevention device allows water to flow in one direction while stopping it from reversing. If pressure changes occur in the system, the device blocks contaminated water from flowing back into the clean supply.

Two Red Industrial Gate Valves Connected by a Central Check Valve — Dunnerite Plumbing in Mount Peter, QLD

Backflow Protection Where It Matters

Backflow prevention is required in environments where there is a higher risk of contamination entering the water supply. These locations often involve stricter requirements to ensure potable water remains safe for everyday use.


Our team works with a range of sites to install and service backflow prevention devices, including:


  • Schools
  • Hospitals
  • Daycare centres
  • Healthcare centres
  • Restaurants


Each system is handled with a focus on correct installation and ongoing performance, helping ensure water quality is protected over time.


Contact us to organise backflow prevention for your site.