Hot Water line to toilets

Discussion in 'Toilet Forum discussions' started by Wiz, Jul 16, 2006.

  1. Wiz

    Wiz New Member

    Messages:
    2
    Location:
    carrollton,oh
    Hi everyone,
    Just starting new house construction, and want to run hot water lines to the toilets, to prevent condensation. Can't seem to find any discussions on this topic. System is a well water operation. Good idea or not ? Why or why not? Thanks in advance for any thoughts.
  2. Gary Swart

    Gary Swart In the Trades

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    7,298
    Location:
    Yakima WA
    Not a good idea. As I understand it, the hot water can break the toilet. You might be able to use a tempering valve that would mix hot and cold water to give an acceptable temperature, but don't run straight hot into it.
  3. Wiz

    Wiz New Member

    Messages:
    2
    Location:
    carrollton,oh
    Gary,
    Thanks for your input. I thought this question would generate a significant number of responses.
  4. Mikey

    Mikey Aspiring Old Fart, EE, computer & networking geek

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    Location:
    Central Florida
    I thought about that once as a water conservation measure, thinking that instead of running the not-yet-hot water in the shower, I'd use the toilet first, flush with not-yet-hot water, and then have hot water ready in the shower. Of course that only made sense if I was going to use the shower immediately, so I abandoned that idea and bought a Chilipepper appliance (http://www.chilipepperapp.com/), which works pretty well.

    Anyway, absent a full-time hot-water circulating system, I doubt it'd be hot enough to break the toilet, at least on the first flush. Gary's suggestion of a tempering valve is probably the best bet. I inadvertantly solved this problem when I re-plumbed my house overhead, following an under-slab leak. The cold water line winds up being attic temperature (i.e., very warm) -- ain't nothing going to condense on that toilet.
  5. Mikey

    Mikey Aspiring Old Fart, EE, computer & networking geek

    Messages:
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    Location:
    Central Florida
    There's another thread discussing sweaty toilets here -- I suggested on that one you just buy a submersible aquarium heater and use it to keep the tank at a cozy temperature. You could really go nuts and build a controller that would determine the minimum temperature required to keep the tank exterior above the dewpoint and power the heater appropriately. It'd be a good science project, or a good gift for your girlfriend ;) .

    http://saltaquarium.about.com/cs/setupequipment/tp/TPheaters.htm
  6. hi wiz boy

    I agree with you. It stuns me that this topic has never been discussed in detail and that it is not "standard" practice everywhere to plan for a way to let cold pipes get warmer in the house first before you flush the toilet with it.

    i just posted on the other thread. I think it is
    http://www.terrylove.com/forums/showthread.php?p=43023#poststop

    i have often thought about how to run plumbing pipes so as to get the water moving through the whole house and then tap into that for the toilet supply. The idea is to use water that has already given up its coolness and picked up warmth, a little bit of "natural" hydronic heat transfer just to flush the toilet. Makes no sense to me to have extremely cold water for the toilet or the lavatory sink. Or anywhere else.

    David
  7. stress cracks will result

    If you were to run hot water to your toilet

    two things will happen to you


    the wax ring will eventually "melt away" that forms the seal
    to the flor


    the toilet tank could very easily just suddenly go SNAP

    one morning.... remember that you will have normal

    room temp water in the toilettank first thing in the morning....

    then you flush it and throw in hot water into the china tank....

    thats not good at all...


    china does not like to be put through srtess like that..
  8. Verdeboy

    Verdeboy In the Trades

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    2,051
    Another concern I might have is the growth of unhealthy molds and other smelly yucky stuff in your tank. A toilet tank isn't air-tight like a hot water tank, so it will get a little "swampy' in there.
    Last edited: Jul 20, 2006
  9. Mikey

    Mikey Aspiring Old Fart, EE, computer & networking geek

    Messages:
    2,713
    Location:
    Central Florida
    Oooh, excellent point. Now we have to add a chlorine injector to the mix...
  10. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

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    21,802
    Location:
    New England
    You don't want chlorine, at least in higher than drinkable levels, in anywhere there are plastic or rubber parts...it usually will turn them to mush quickly.
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