Troubleshooting milky hot water problem. Milky or cloudy look from your heater is not harmful and has no health concerns, but might have an unpleasant look.
The first question before trying to do any repairs is to ask yourself, why hot water is milky and has the cloudy appearance?
The main cause of the cloudy appearance is the presence of the additional air (dissolved oxygen and other gases) in the plumbing system. There are several reasons how the extra air got in the plumbing, through the heater and the tap:
As you can see milky look is actually not a problem. Troubleshooting is simple... it takes time for bubbles to clear up, and the unpleasant milky look inside your glass of water to disappear.
Keep in mind that cloudy or milky hot water is not harmful for you, it represents the air bubbles and once they rise to the surface they disappear so as the milky hot water appearance. Also, this problem is not related to the hot water line only, cloudiness can be found in cold water line also, where it dissolves faster than in the hot. It can be visible in new and old heaters equally.
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