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Is your hot water safe?

Did you know hot water maintained at 60°C can cause third-degree burns in just 1 second? To reduce the risk of scalding, tempering valves are installed to limit the hot water delivery temperature from the taps to 50°C. Hot water maintained at 50°C takes 5 minutes to cause third-degree burns, avoiding preventable accidents.

Stay safe from hot water burns – Book our licensed plumbers now for tempering valve installation, testing and repair services across Brisbane and the Gold Coast.

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Book a plumber now!

Get upfront pricing, guaranteed workmanship and a free plumbing inspection, when you book one of our expert Ryan Old plumbers today!

What is a tempering valve?

Tempering valves are control valves that maintain the hot water temperature at a set level. The valves consist of thermal sensors that react to temperature changes. Hot water from your heater flows through the tempering valve wherein the temperature is lowered by adding just the right amount of cold water. The valve closes and water is delivered to your tap.

Why are tempering valves mandatory?

Many fresh water sources naturally contain small amounts of a bacteria called Legionella which grows best between 20 – 60°C. To keep the water safe from the rapid growth of legionella bacteria and prevent Legionnaires’ disease in humans, hot water needs to be maintained above 60°C in storage. However, if the water is delivered to the tap fixtures at this temperature it can quickly cause scalding. That’s why tempering valves or TMVs are installed, to safely reduce the temperature of the water to 50°C or 45°C.

Legionnaires disease is a type of severe pneumonia which can be fatal in some cases. People above 65 years of age, smokers, chronic lung disease patients or people with a weak immune system are at high risk for Legionnaires disease.

Can I install a tempering valve myself?

Installing tempering valve requires expertise and it is definitely not a DIY job as it can be dangerous if done incorrectly. Only qualified plumbers can install tempering valves – Ryan Old Plumbers have expert plumbers who can do the job correctly the first time. Call us now for installation, testing or repairs for your tempering valve.

Regulations for tempering valves

  • Tempering valves are required for bathroom renovations, new builds, hot water system installation and new pipings.
  • According to the Plumbing Code of Australia, hot water tank temperature needs to be maintained at or above 60°C.
  • Tempering valves are mandatory to comply with the AS/NZS 3500.4:2018.
  • For bathroom taps:
    1. The temperature of hot water should not exceed 50°C – in this case, tempering valves need to be installed.
    2. The temperature of hot water should not exceed 45°C for hospitals, schools, aged care centres, any facility for children, disabled or sick individuals need to supply – in this case, TMV needs to be installed.
  • Restricting the hot water temperature for laundry and kitchen is optional.

Difference between tempering valve and TMV

Both a tempering valve and TMV mix hot water with cold water to prevent burns and ensure a consistent delivery temperature. TMV restricts hot water at 45 °C whereas tempering valves restrict water at 50°C. TMVs are used in commercial applications as they respond faster to changes in water temperature and pressure compared to tempering valves.

Types of tempering valves

  • Blue Cap tempering valves are used for electric hot water heaters. It is used with electric hot water heaters that supply water between 65-75 degrees Celsius.
  • Green Cap tempering valves are used for gas hot water heaters.
  • Orange Cap tempering valves are used for solar and heat pump hot water
  • Black Cap tempering valves are used for large capacity systems.

Contact the tempering valve experts Brisbane & the Gold Coast

Our licensed plumbers can install, repair and test tempering valves throughout Brisbane, Moreton Bay, Logan, Redland and Gold Coast. Contact us today at 1300 055 940 or complete our online job booking form.

Book a plumber now!

Get upfront pricing, guaranteed workmanship and a free plumbing inspection, when you book one of our expert Ryan Old plumbers today!

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Here at Ryan Old Plumbing, we’ve helped thousands of Brisbane & Gold Coast residents just like you with plumbing emergencies, repairs and installations. What did they have to say about Ryan Old Plumbing team? Read some of our many five-star reviews to find out!

Very good to deal with. Had a hot water system fully installed and working within a few hours of first calling them...

Jasper Bennett

The plumber was punctual and very polite and explained the problem and remedy for my hot water system.

Justin Jefferson

Great service from Ryan's crew. Craig arrived and fixed the problem with our hot water system...

Frankie Pearce

Book a plumber now!

Get upfront pricing, guaranteed workmanship and a free plumbing inspection, when you book one of our expert Ryan Old plumbers today!


TMV VS Tempering Valve - What's The Difference?

When you turn your hot water tap on, you expect hot water to flow out. Whether it is a shower, bath, kitchen sink or laundry basin, water at a particular temperature will always run from the faucets in your home or workplaces. But how does that occur?

Tempering valves and TMVs are the devices responsible for ensuring that the water that comes out of your tap is safe and at the right temperature. But, what is the difference?


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What size of hot water system do I need?

Hot water is a crucial part of Australian life, from showers and baths to dishwashers and washing machines. But how do you know what hot water system size is best for your needs?

With so many hot water options on the market, you would be excused if you find it all a little overwhelming. Keep reading to find out more and if you would like further help, give Ryan Old Plumbing a call on 0488 856 880.


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Which hot water system is best?

A working hot water system is an essential part of a comfortable living environment, especially during winter. However, knowing the right hot water system for your home can be quite challenging because there is so much to consider. Do you know if you want a gas, electric, solar or heat pump system? Will your water supply be from a storage tank or continuous water flow? How big will your tank be? How much do hot water systems cost? This article will provide you with all of the information you will need to know about hot water systems.


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Next steps


Call Ryan Old Plumbing and speak with our customer service team. 


Tell us about your plumbing problem and when you would like us to attend.


Once details have been taken, our dispatch team will contact you to confirm a suitable date and time.


We will contact you when we are 30 mins away from arriving at your property.


With your approval we will do the job on the spot or arrange for our install team to carry out the works.


We ensure you are happy with the work carried out, clean up after ourselves and leave your property in great condition.


We accept payment and provide a receipt on the spot.


After the job is complete we welcome your feedback and provide you with a lifetime workmanship warranty.

Book a plumber now!

Get upfront pricing, guaranteed workmanship and a free plumbing inspection, when you book one of our expert Ryan Old plumbers today!