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Thread: Imploding water heater?

  1. #31
    Jack of all trades frenchie's Avatar
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    I always use this video:

    http://www.waterheaterblast.com/

    it's a lot shorter, so even impatient DIYers will actually watch it.
    Master Plumber Mark:

    there is nothing better than the
    manly smell of WD 40 in the air
    while banging away on brass with a chisel and hammer...

    it smells like......victory......

    do not hit your thumb...
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  2. #32
    Master Plumber Redwood's Avatar
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    Yea it's short but it lacks the true effects...
    Digging a hole, dropping one in the hole and lighting the fuse isn't real world!
    When one of these cook off the house is toast!
    Take a look at these links to see how the house makes out when a water heater blows!

    TV News Coverage of a Water Heater Explosion

    Slideshow showing the damage to the house from above link

    Thats real world baby!

  3. #33

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    Quote Originally Posted by Redwood View Post
    What I'm asking is if there was anytime when the water heater was in effect a closed container while it was cooling. If you were to take a 1 gallon tin and heat it in a pan of boiling water then screw on the cover and take it off the heat it would collapse....


    It would not collapse if you use a vacuum relief valve on the cover. That water heater has one installed on it, but is it any good?

    I wonder how old that heater is anyhow? Even to my DIYers eyes that water heater is now toast!

  4. #34
    Master Plumber Redwood's Avatar
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    It really is a moot point whether it was vacuum or, pressure...
    The water heater is scrap!

  5. #35

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    For what it is worth, the expansion tank pictured looks to be one designed for a hydronic system. Not sure if it is connected to the water heater or not. If it is a hudronic tank it will not last long on a potable water system like this one.
    btw
    I agree. Change the water heater and have a professional do it!

  6. #36
    Master Plumber nhmaster's Avatar
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    The expansion tank in the picture is connected to the boiler, not the water heater.

  7. #37
    Moderator & Master Plumber hj's Avatar
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    Default heater

    Definitely. The glass liner is not flexible so any movement of the metal would crack it. But since even a new heater might not have a perfect glass lining, that is why heaters have anode rods. One thing not mentioned in all the posting, unless I missed it while scanning them, is that it is almost impossible to create a destructive negative presssure with the heater in the basement, and even if it were possible, you have a vacuum relief valve to prevent it.

  8. #38
    Plumber jimbo's Avatar
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    This doesn't end the debate, but is interesting. It shows that the bottom of a water heater is concave ( dished inward ) but the top is convex ( domed upward ):

    http://uk.youtube.com/watch?v=1ofSyXUW0TY

  9. #39
    Extreme DIY Homeowner Scuba_Dave's Avatar
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    I wasn't aware an expansion tank was needed on a WH?
    My last house had gas WH & it didn't have one. But that doesn't really mean anything as I found a lot of problems with my old house. I have seen them on boilers, but never one on a WH connection. New house was an oil fired WH & was replaced with an electric model when the oil fired started leaking & the bottom let loose. I know a new pressure relief valve was installed, as the old one was leaking

    I saw the exploding Wh video on another site maybe 2 months ago
    I was unaware that something like that could happen
    Last edited by Scuba_Dave; 01-14-2009 at 09:55 AM. Reason: sp
    DIY Handyman (not 4 hire)
    I have enough to do to my own house

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