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Thread: CSST in return

  1. #1
    mathew stouffer's Avatar
    mathew stouffer Guest

    Default CSST in return

    I posted a previous thread regarding this issue and the discussion kind of went off track. Is CSST allowed in returns? I could not find anything on a manufactures tag. Sorry no pic yet.

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  2. #2
    mathew stouffer's Avatar
    mathew stouffer Guest

    Default Re: CSST in return

    Ok here is a pic. Got the light.

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  3. #3
    Chuck Lambert's Avatar
    Chuck Lambert Guest

    Default Re: CSST in return

    Quote Originally Posted by mathew stouffer View Post
    I posted a previous thread regarding this issue and the discussion kind of went off track. Is CSST allowed in returns? I could not find anything on a manufactures tag. Sorry no pic yet.
    Is ANY gas line allowed in a furnace return?? CSST or otherwise. Why would CSST be allowed and regular gas line not?


  4. #4
    mathew stouffer's Avatar
    mathew stouffer Guest

    Default Re: CSST in return

    I don't know, and that is why I am asking.


  5. #5
    Join Date
    Mar 2007
    Location
    Spring Hill (Nashville), TN
    Posts
    5,851

    Default Re: CSST in return

    Well the picture is about an inch square so it is kind of hard to see anything, but nothing should be in a return duct. It should be a completely sealed with nothing in it other than the air that is being returned to the unit.

    Scott Patterson, ACI
    Spring Hill, TN
    www.traceinspections.com

  6. #6
    Join Date
    Jun 2008
    Location
    Maryland
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    1,096

    Default Re: CSST in return

    It's especially risky to have CSST near conductive metal such as return ducting. It makes it more likely in the event of a lightning strike for arching to burn through the CSST and create a gas leak.

    Always check for bonding of the gas piping, especially is there is CSST anywhere in the house.


  7. #7
    Chuck Lambert's Avatar
    Chuck Lambert Guest

    Default Re: CSST in return

    Quote Originally Posted by mathew stouffer View Post
    I don't know, and that is why I am asking.
    As Scott stated there should be nothing in the return. Gas lines are not allowed.

    Chuck

    Last edited by Chuck Lambert; 03-23-2010 at 07:50 AM.

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