Does water boil inside the water heater?
Sometimes i heat with propane and other times electric. I notice on electric i will be hanging out and hear what sounds like boiling water. It comes from the water heater. I turn on the water pump and...
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Yes, it boils. But only near the heat source, not a rolling boil. The water in contact with the heat source boils (changes to gas) and then almost immediately condenses, producing the sound. You can see similar in a pot on a stove, where the same thing happens long before the bulk of the water is anywhere near boiling temperature.
