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Tempering valves are usually installed in standard home water heating situations. A thermostatic mixing valve would be fitted if there was a requirement for more exacting control of the water temperature, as well as in larger applications.

A tempering valve is accurate to around 3℃ +/-, while a thermostatic mixing valve can keep the water to 1℃ +/- and responds faster than a tempering valve to changes in incoming water temperature.

Often tempering valves and TMVs can also restrict the supply of hot water totally if for some reason the cold water stops, further safeguarding against burns.

The problem with keeping your storage hot water at this temperature is that at 60℃ hot water can cause severe scalding in only a few seconds. Small children, the elderly, and the infirm are some of the groups at most risk of burns.

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Prohibiting the growth of bacteria in your hot water system is achieved by maintaining the thermostat at 60℃ (140℉) or above. However, increasing the temperate significantly above this will just result in higher power bills, not added protection.

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Not sure which one is right for your hot water system? Contact our Sutherland Shire plumbers for professional advice and tempering valve installation services.

Both valves contain a temperature-sensitive element which expands or contracts in response to temperature changes in the incoming water. This expansion and contraction control a slide valve which allows more or less hot or cold water into the mix to consistently maintain the desired temperature.

Solution - install a tempering valve or TMV to the hot water pipe supplying personal hygiene areas (bathrooms), in some situations the whole house, which reduces the water to a much safer 50℃ (122℉), or in some cases 45℃ (113℉), to safeguard residents.

Water heater and water tank failures can happen at any time, often without warning. If the leak is not immediately detected, substantial flooding and property damage can occur. Certain companies have designed Water Heater Leak Alarm and Automatic Shut-Off Systems.

A large tourist attraction in Melbourne was totally shut down due to a Legionnaires disease outbreak caused by bacteria breeding in the building’s air conditioner cooling tower system. This is just one example of many and is why we should take the risk seriously in our homes.

Not only should owners look into this, but board of directors may want to require each owner to install these. Remember, claims are the single biggest reason insurance premiums increase and anything that can be done to prevent or reduce losses should be researched.

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The large volume of water which spends most of the day just sitting in your hot water tank (unless you have instant) is a perfect breeding ground for all sorts of nasty bacteria. One of which is the Legionella bacteria that can cause a serious pneumonia-like bacterial infection Legionnaires disease, which in some cases leads to death.

TMVs are often more expensive to install, however, can be repaired and maintained lasting longer on average than a tempering valve. The Australian Standard states that tempering valve testing should be carried out every 12 months with thermostats and o-rings replaced every 5 years.

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Not sure if you need to install a tempering valve or a thermostatic mixing valve? Your local plumber can provide you with advice specific to your water heating requirements but here’s the low down to get you started.

Australian plumbing regulations state that all hot water systems in new homes must be fitted with a tempering valve to control the hot water supply to the bathrooms. Our plumbers recommend installing a valve on all storage hot water systems, new and old.

Water heater and water tank failures can happen at any time, often without warning. There are new precautions that can be taken to avoid major damage when a leak occurs- Sarah explains more.

It’s especially important to fit a solar hot water system with a tempering valve because of the higher temperatures the water can be heated to on hot sunny days.

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This disables the cold water supply line to hot water tanks, or similar applications with basic plumbing installation. Units are generally powered by a standard 120 VAC wall outlet.