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Thread: Opinion on expansion tank installation. Picture included.

  1. #1
    DIY Junior Member John Vega's Avatar
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    Thumbs up Opinion on expansion tank installation. Picture included.

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    I am not an experienced plumber, however I am a little paranoid that the expansion tank that was recently installed in our home may eventually cause the pvc piping to fail due to the weight, stress being applied by the tank/fittings.

    Attached is an image of the install. Should I be worried?

  2. #2
    Moderator & Master Plumber hj's Avatar
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    you should be worried about that, but maybe more so that the CPVC plastic is attached directly to the tank. There should be AT LEAST 18" of copper between the tank and the plastic, with the expansion tank attached to the copper and PROPERLY supported with hangers or anchors.

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    DIY Junior Member John Vega's Avatar
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    Quote Originally Posted by hj View Post
    you should be worried about that, but maybe more so that the CPVC plastic is attached directly to the tank. There should be AT LEAST 18" of copper between the tank and the plastic, with the expansion tank attached to the copper and PROPERLY supported with hangers or anchors.
    Thanks for the quick reply!

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    General Engineering Contractor ballvalve's Avatar
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    Curious if you had a licensed plumber install that joke bit, or was it a mentally challenged handyman?

    Dont be worried. Be ANGRY.

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    DIY Junior Member John Vega's Avatar
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    Quote Originally Posted by ballvalve View Post
    Curious if you had a licensed plumber install that joke bit, or was it a mentally challenged handyman?

    Dont be worried. Be ANGRY.
    Yes. Bayonet Plumbing, Heating & AC, Inc. http://www.bayonet-inc.com
    They are a contractor for Lennar homes.

  6. #6
    DIY Junior Member John Vega's Avatar
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    Quote Originally Posted by ballvalve View Post
    Curious if you had a licensed plumber install that joke bit, or was it a mentally challenged handyman?

    Dont be worried. Be ANGRY.
    The company replied to my email:
    " It is mounted correctly, however, if you would like it removed we can send someone out to do that for you.

    In reguard to the 18" of copper pipe: That is a requirement for gas water heaters. It is not required for your electric water heater."

    I am talking with them now via email to come up with a solution to the install issues.
    Last edited by John Vega; 05-26-2011 at 08:45 AM.

  7. #7
    Jack of all trades DonL's Avatar
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    LMAO...

    Nice Rigging...
    Theory only works perfect in a vacuum.

    Cyber Security Protection for Windows C:\ > WWW.WinForce.Net

  8. #8
    DIY Senior Member SteveW's Avatar
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    When that tank eventually fails, it will fill with water. (Right now, it is partially filled with water, partially with pressurized air, and they are separated by a rubber diaphragm.)

    When it is all filled with water, it will be very heavy, and will tip to one side, and will twist the pipe it is attached to, most likely breaking it.

    It needs to be properly supported, in such a way that it will be stable when it is filled with water.

  9. #9
    DIY Senior Member dlarrivee's Avatar
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    Quote Originally Posted by John Vega View Post
    In reguard to the 18" of copper pipe: That is a requirement for gas water heaters. It is not required for your electric water heater."
    So regardless of fuel type both heaters put out hot water... Wow...

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    Master Plumber Redwood's Avatar
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    In Florida the 18" is not a code requirement on electric water heaters.
    The primary concern there is heat damage from the hot flue, not 120 degree water in the tank.

    However they do need to adequately support the expansion tank or it will break off the CPVC if it ever becomes waterlogged.

    CPVC, IMHO is a junk material.
    Last edited by Redwood; 05-25-2011 at 06:26 AM.

  11. #11
    General Engineering Contractor ballvalve's Avatar
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    The best part is the glued in valve butted to the wall that cost $1.98 from Indonesia.

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    DIY Junior Member John Vega's Avatar
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    Thanks for all of your feedback!

    I have done some searching to try and find what the installation "should" look like. I have come up empty handed.
    Do any of you have a diagram or picture of an installation which is done properly?
    Last edited by John Vega; 05-26-2011 at 08:45 AM.

  13. #13
    In the Trades Gary Swart's Avatar
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    The box that Watts tanks come in has suggested methods for installations. What you have is not one of these methods. If I was a professional plumber, which I am not, I would be ashamed of this installation. Not only for how the tank is installed, but the rest of the installation as well. Others have already chimed in on the problems, so no need to restate them.

  14. #14
    DIY Junior Member John Vega's Avatar
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    Quote Originally Posted by Gary Swart View Post
    The box that Watts tanks come in has suggested methods for installations. What you have is not one of these methods. If I was a professional plumber, which I am not, I would be ashamed of this installation. Not only for how the tank is installed, but the rest of the installation as well. Others have already chimed in on the problems, so no need to restate them.
    Wow, thats great to hear
    Last edited by John Vega; 05-26-2011 at 08:57 AM.

  15. #15
    Master Plumber Redwood's Avatar
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    Quote Originally Posted by John Vega View Post
    Wow, thats great to hear lol...
    Crazy thing is HUNDREDS of Lennar homes are plumbed exactly like mine except they don't come with an expansion tank by default.
    I guess if it passes minimum code, you are good to go!
    The Plumbing Code is a minimum standard.

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