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Old 07-07-2016, 07:46 AM   #1
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Hot water in toilets


Guys,
I have a 10 floor building with a pump on the first floor, electric water heaters on each floor. It seems like every morning the cold water lines get very hot for a few hours. Please help
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Old 07-07-2016, 07:54 AM   #2
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Re: Hot water in toilets


FYI: pump is off over night
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Old 07-07-2016, 11:16 AM   #3
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Re: Hot water in toilets


Does This happen on every floor.

Any recent plumbing work done?
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Old 07-07-2016, 12:17 PM   #4
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Re: Hot water in toilets


I think the only thing you can do is to try leaving the pump on all night. See if that changes the situation.
If it doesn't, I would suggest you call a plumber to run it down. Hot water cross connections can be difficult to find in a normal home. It's a lot more difficult in a 10 story building.
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Old 07-07-2016, 12:22 PM   #5
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Re: Hot water in toilets


Quote:
Originally Posted by jmon View Post
Does This happen on every floor.

Any recent plumbing work done?
Yes...a few projects have been done throughout
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Old 07-07-2016, 01:07 PM   #6
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Re: Hot water in toilets


Quote:
Originally Posted by mozart6099 View Post
Yes...a few projects have been done throughout
Start there. Recheck all new plumbing work. Make sure of no cross connections. Try to narrow it down.

Try oso suggestion.
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Old 07-09-2016, 07:55 AM   #7
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Re: Hot water in toilets


A common reason for crossover is turning off a shower or mixing faucet using a spout or sprayer cutoff while leaving the faucets or main lever in the on position.
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Old 07-09-2016, 08:27 AM   #8
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Re: Hot water in toilets


Not a plumber but I've read that enough pressure in the hot line/tank can backup into the cold line. Maybe the tanks need a pressure tank (name?)?
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