A home with a hot water heater that has been rated as safe by the Institute for Safe Water and Wastewater (ISAW) will not be required to meet strict government water-testing requirements under a new law.

The IAWS, which regulates the use of water heaters in Australian homes, is set to announce the new water-test requirements for the new model, which will come into effect from March.

“As with other models, the water heater is subject to a water hardness test and a heat resistance test,” a statement from the institute said.

“This testing takes place at the end of the heaters life cycle and can take several weeks to complete.”

The new legislation, which was announced on Tuesday, will mean the water heater must meet the IAWs standard, which is currently 70 per cent of the recommended water hardness.

“The water heater may be tested only once during the life cycle, but if a failure occurs, it is presumed to be caused by the heat source,” the statement said.

The statement did not clarify whether or not it meant the water-resistant model would need to meet the stricter standard.

A water heater in a water cooling unit that has met the IASW standard for the past 30 years is safe to use in Australia, according to the institute.

A hot water boiler with a heat source that has a water-proofing rating of less than 50 per cent is considered safe.

Water heaters that meet the IIASW requirements, which have been in use for 30 years or more, are required to be tested at least once a year.

The IASw has long had concerns about the water in hot and cold water heatings.

It said in a statement that water heat and water coolers are “a safe and efficient means of heating water”.

“There is a strong scientific consensus that heat and cold sources provide a safe and reliable heat to cool the water to the safe temperature and pressures required for drinking, cooking and drinking-related purposes,” the IAsw said.

It also said the heat-resistant and water-repellent versions of the water boiler should meet the water hardness and heat resistance requirements.

The institute said the law would make the water temperature safe for drinking.

“While the heat is not as hot as the cold, it has an effective heat capacity and can be used safely for drinking purposes,” it said.

It also noted that the heat can be applied on top of a tap to reduce the amount of hot water used to cool a hot surface.

“For water cooling, it can be safely used to add water to a hot tap without adding excessive water to hot water.”

The hot water temperature should be “just enough to cool down a hot sink or bathtub and still keep it safe to drink, so the water cannot get too hot and will not cause a waterborne illness,” the institute added.

The water-cooling heater that meets the water and water hardness requirements, according the Iaws, should be tested once a month.

“The heat source must be water that has an adequate heat capacity for a given temperature,” the institution said.

“This means that the hot water source can be tested for a minimum of once a week.”

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