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Someone didnt take home ec hahaha (lemmy.ml)
submitted 1 month ago by to c/microblogmemes@lemmy.world
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[–] 2 points 1 month ago (1 child)

That's crazy, I've never heard that. I know our hot water heaters are kept high enough that bacteria can't grow, and every source I've found says the other risk is lead contamination, and we don't have any lead pipes in our house, so I'm going to assume this is an old outdated rule. Plus for the bacteria concern, it's being boiled again anyway.

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  • [–] 3 points 1 month ago* (1 child)

    Even without lead pipes, it may be worth testing ….

    • what about all the pipes bringing water to your house?
    • copper pipes used lead-based solder for many years, so can still leach lead into hot water

    My reason for not putting hot water into the kettle is that I need to run the water for a bit to get it hot, and that takes longer than the few seconds I’d save

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  • [–] 2 points 1 month ago

    1: all the pipes leading to my house are out of my control and will be sending the same temperature and purity of water regardless of what temperature I set the tap to? The water goes into my house, to the hot water heater, to the tap. Or just into my house to the tap. Either way whatever is outside of that is outside of my control and the hot water heater can't cause the water to retroactively absorb lead from pipes outside of my house.
    And as for your second point. Running the kettle from cold takes like 4-5mins. Running the hot water to max temp takes 30 secs. Running the kettle with max temp water takes 1:30-2 mins. That's still like a 50% time savings, for a 500ml load. I haven't tried with larger amounts than that because I don't need more than that, but I assume that the greater the volume of water, the more time it would take from cold.

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