Water Heater User Manual

Hot water from the faucet appears milky (Non-Warranty)
When water is initially drawn from the faucet it appears to be milky or
cloudy, but it becomes clear after the water is allow to stand for several minutes.
This is usually an indication that the water contains high levels of soluble gases
such as oxygen, chlorine, carbon dioxide, hydrogen sulfide or others. As the
water system pressure increases, the amount of gas that water can hold in a
solution decreases. When air and gases are forced out of the heated water, the
problem may be evident in one or both of the following conditions:
• Gases, in the form of small bubbles, may make the water appear milky from the tap, but
clear after several minutes when those bubbles will separate. Similar to the reaction that
occurs as air bubbles form on the walls of a pan shortly before the water begins to boil.
• The release of dissolved gas can also create air pockets and air locks in the water system
piping. This can cause spurts of air or gases when opening the hot water faucet.
There is generally no cure for milky water caused by dissolve gases, although
it can be reduced with aerated faucets. In some applications, the amount of air
and gases precipitating out of the water will reduced in time. It should be noted
that these gases are not harmful to the end user.
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