What Is A Tempering Valve And Do I Need One?

Are you wondering what is a tempering valve? Luckily, you are not the only one with this question. As per the Plumbing Code of Australia, installation of the tempering valve is a must. With this valve, now you don’t have to worry about hot water scalding or causing severe burn injuries to family members. Read onto the section below to know all about the tempering valve.

What is a Tempering Valve

What is a Tempering Valve?

Are you thinking – what is a tempering valve on a hot water system? Well, it is basically a three-way mixing valve, which is used to restrict the hot water temperature. It mixes the hot water with the cold water to generate hot water at a particular temperature. Now, you can get hot yet not boiling water from your faucets.

What Does a Tempering Valve Do?

This is an extremely valid question and needs to be answered. The tempering valve reduces the water temperature, thereby leading to a decrease in the risk of severe burns and scalding. You might not realize, but scalding can occur in the span of a second. The result is a painful injury that is hard to bear.

Take a look at the hot water temperature and their consequences on human skin –

  • At a temperature of 50°C, a severe bun can occur just after 5 minutes
  • When the temperature is at 55°C, the severe burn can happen within 10 seconds
  • When the temperature reaches 60°C, severe burn is possible within a second

How Does Work?

If you are curious about how does a tempering valve works, it is rather simple. In this three-way mixing valve, one is responsible for allowing the hot water to come in. The second one ensures the entry of cold water from the pipes, and the third valve is the one where the temperature-reduced water (50°C) comes out from the taps.

The thermostatic element present within the tempering valve plays a significant role. While it remains submerged in the water, it is still highly sensitive to temperature changes of the water. Depending on the temperature changes, expansion and contraction of the element take place. Due to this, a piston that is responsible for the opening and closing of the outlet and inlet valves are influenced.

The piston starts mixing the cold water with the hot water till it reaches the temperature of 50°C. After that, the outlet valve opens, and the hot water moves out.

Do I Really Need a Tempering Valve?

Now that you know what is a tempering valve, it is vital to understand if installing one is mandatory. According to the Plumbing Code of Australia, any hot water stored must be kept at a temperature that combats the growth of Legionella bacteria and others. To meet this particular condition, the storage tanks of the hot water systems are set at 60°C or more.

The problem lies with the fact that hot water with a temperature of 60°C or more can cause severe health risks to humans. This is when tempering valves come to the rescue. While the tank must have 60°C or more temperature, the water that comes out from the taps is at a maximum of 50°C. This way, you prevent illness from the harmful effects of the Legionella bacteria and also reduce the scalding risk drastically.

Note: For nursing homes, healthcare centres, schools, early childhood centres, etc., the water coming out of the taps must not exceed 45°C.

Is it Possible to Adjust a Tempering Valve?

Can you adjust a tempering valve? It is possible to adjust the tempering valves with the aid of a knob. You can set it anywhere from 35-55°C. The adjustments made by the licensed plumber must not exceed 50°C.

However, if you want, the hot water plumber can set the temperature of the tempering valve to be lower than 50°C.

How to Install a Tempering Valve?

Do you want to know how to install a tempering valve? Check out the steps that plumbers generally use to install.

  1. First of all, select a desirable place for the tempering valve. Keep in mind that it must be somewhere accessible in case of repairs.
  2. Then, adjust the pressure of the hot water system.
  3. After this, fix the copper pipes to ensure that the valve fits properly.
  4. Now, get rid of the tailpieces. Take a look at the union nuts and make sure they are above the pipes before connecting them with the tailpiece.
  5. Then, use the filter gasket for cold and hot water inlets. For the outlet, opt for a fibre gasket.
  6. Lastly, turn on both the cold and hot water. Look out for any leaks. If you see any leakage, you need to fix it right away.
  7. Now, you can use.

Location of the Tempering Valve

Generally, the tempering valve is installed where the hot water system is placed. The plumber will also need to install line strainers, isolating valves, check valves, etc. You must also use pressure-reducing valves if there is a problem with the water pressure in your house.

Want to Install a Tempering Valve? Get Professional Assistance Now!

It is without a doubt that tempering valves play a major role in offering safety from excessively hot water. Apart from this, the tempering valve is also a critical part of the hot water system in your house. That is why installing it falls under Australian regulations. However, you must always seek expert aid when installing. It is advisable that you do not try anything yourself.

Plumber Blacktown is a leading plumbing service provider. We boast of a team of certified technicians and plumbers with years of experience and extensive knowledge. Moreover, we use the latest tools and devices for installation purposes. Furthermore, we are open 24/7 and charge attractive price rates. Contact us, and we will send you help right away!