Backflow Prevention & TMV Testing
Licensed Backflow Testing & Thermostatic Mixing Valve Compliance for Homes, Businesses & Commercial Sites
Backflow prevention devices and thermostatic mixing valves (TMVs) are essential safety components that protect your property—and the wider community—from contaminated water, scalding risks and plumbing system failures.
At Hughes Plumbing, we provide fully certified Backflow Testing, Backflow Prevention Device Installation, TMV Testing and Annual Compliance Reporting across Brisbane, Gold Coast and the Sunshine Coast.
Our licensed and accredited plumbers ensure your systems meet Queensland regulatory requirements, keeping your property safe, compliant and professionally maintained.
What Is Backflow Prevention?
Backflow occurs when water flows in the opposite direction—allowing contaminated or non-potable water to enter your clean water supply.
Backflow prevention devices protect against hazards such as:
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Irrigation chemicals
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Fire hose reels
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Commercial equipment
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Industrial fluid lines
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Stormwater cross-connections
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Contaminants from hoses, tanks or machinery
Queensland law requires certain properties, particularly commercial or high-risk facilities, to install and test backflow devices annually.
What Is TMV Testing?
A thermostatic mixing valve (TMV) blends hot and cold water to ensure a safe, consistent outlet temperature, preventing scalding injuries.
TMVs are legally required and must be tested annually in facilities such as:
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Childcare centres
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Hospitals & medical clinics
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Aged care homes
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Schools
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Commercial kitchens
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Public facilities
Hughes Plumbing is fully accredited to service, test, repair and certify all types of TMVs.
Book Your Backflow or TMV Test Today
Stay compliant, stay safe and ensure your plumbing systems are meeting Queensland’s strict standards.
Hughes Plumbing provides reliable, certified and fast testing services for all industries.
Call Hughes Plumbing Contractors on 0406 288 142.
Frequently Asked Questions
In Queensland, backflow prevention devices must be tested every 12 months by a licensed and accredited backflow tester. This ensures the device is functioning correctly and preventing contaminated water from entering the drinking supply. Hughes Plumbing provides annual reminders to ensure ongoing compliance.
TMVs ensure water is delivered at a safe, controlled temperature to prevent scalding injuries—especially important for young children, elderly people and individuals with reduced mobility or sensitivity. Queensland regulations mandate annual TMV testing in these facilities to ensure safety and compliance.
If a device fails, Hughes Plumbing provides a detailed report outlining the reason and recommended repairs. We can repair or replace the device and complete retesting to ensure it meets all compliance standards before submitting final certification.
Yes. We can test as many backflow devices or TMVs as required during one visit—ideal for commercial buildings, schools, shopping centres, medical facilities and multi-residential properties. Consolidating testing helps reduce downtime and ensures site-wide compliance at once.