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Question:I've heard that hot tap water is not safe to drink--is there merit to this claim or is it just an urban myth?

fongvania is asking a question about general: Follow this topic

by fongvania | June 21, 2021 05:55 | #26859

Does hot tap water increase the likelihood of metal leaching from the pipes? Interested to hear about if there are any studies or regulations specifically focused on hot tap water


A Big Fan of Hot Water


The only thing I can think off is the magnesium electrode in the middle of most electric water heaters. It's there to stop the body of the water heater from rusting, decaying, etc. by using electrochemical action. But it only lasts so long.. and then the magnesium is entirely gone. That's why there is typically a warranty of only two years on most water heaters. In rural situations(well water), the magnesium can react with other chemicals in the water to produce nice smelling chemicals like hydrogen sulfide. So occasionally, you will find the magnesium rod cut out of water heaters. In a situation like that, it is possible for other chemicals to leach out. I'd like to see hard data, first. There are probably more issues with the drinking also.

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