• 20+ years of experience in plumbing & gasfitting
  • Gas & electric hot water system specialists
  • Available 24/7 for emergencies

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A Row of Red Valves Sitting Next to Each Other in a Factory — Dave's Plumbing and Gasfitting in Maroochydore, QLD

Sunshine Coast Backflow & TMV

To prevent the reverse flow of water – which may contain contaminants – occurring at your property, it’s important to ensure the right backflow prevention devices are installed. That’s where we at Dave's Plumbing & Gas Fitting come in. Servicing the Sunshine Coast, we will make sure the right system is fitted at your premises.


Reverse flow contamination can occur wherever piping gives access to the drinking water supply, including submerged inlets, removable sections and temporary devices. Contaminants can come in the form of fertiliser residue, certain kinds of soaps and harmful chemicals. Backflow can result from a change in water pressure. By having backflow prevention devices installed, you can minimise risk to your property.


Backflow devices must have a Backflow Prevention Check performed by a licensed Backflow plumber annually. A Backflow Prevention Form 9 is completed and sent to the council.


Our team can install, repair and maintain all kinds of backflow prevention devices. We are able to provide services for irrigation systems, fire hydrants, swimming pools, grey water systems, vehicle maintenance pits, and more.


Contact us today to get started.

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Thermostatic Mixing Valves (TMV)

A Thermostatic Mixing Valve (TMV) is used to mix hot and cold water, ensuring hot water temperatures are at safe levels. Failing to have a properly functioning TMV in place could put you or your family at risk of being badly burnt by hot water. Our plumbers provide regular servicing and testing for your TMVs, ensuring they are functioning at the right level – that being temperatures between 39°C and 43°C.


To arrange a TMV service with Dave's Plumbing & Gas Fitting, get in touch with us today. We also offer electric and gas hot water system services, general plumbing and much more.

A Close Up of a Water Pipe in a Park — Dave's Plumbing and Gasfitting in Maroochydore, QLD

Frequently Asked Questions

  • How can I prevent backflow in my plumbing system?

    Installing a backflow prevention device, such as a check valve or backflow preventer, will stop water from flowing backward into your pipes. Regular maintenance is key to ensuring the system remains effective.

  • How often should a backflow preventer be tested?

    Backflow preventers should typically be tested annually by a licensed plumber to ensure they’re working properly. Some regions may require more frequent testing based on local regulations.

  • What causes backflow to occur?

    Backflow can occur when there is a sudden drop in water pressure (like during a water main break) or when there is a cross-connection between potable water and contaminated water sources, such as irrigation systems or fire sprinklers.