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Thread: h2o venting

  1. #1
    cris donato's Avatar
    cris donato Guest

    Default h2o venting

    1950 house, 10 yr old h2o tank, can there be a 90 degree elbow in the vent line? line goes up 12" with a 90 then 8" into a larger vent up to roof.
    problem is that the pilot light goes out? new gas valve, new thermocouple. only change is an upper combustion air vent was added!
    thanx cris
    insp123@cox.net

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  2. #2
    Join Date
    Mar 2007
    Location
    Philadelphia PA
    Posts
    3,177

    Default Re: h2o venting

    Maybe that larger vent you mentioned is too big and with the added combustion air vent improving the flow through the room it's blowing out the pilot.

    "There is no exception to the rule that every rule has an exception." -James Thurber, writer and cartoonist (1894-1961)
    www.ArnoldHomeInspections.com

  3. #3
    Join Date
    Mar 2007
    Location
    Dallas, Texas
    Posts
    4,112

    Default Re: h2o venting

    Make sure the draft hood is in place.

    Jim Luttrall
    www.MrInspector.net
    Dallas, Texas

  4. #4
    cris donato's Avatar
    cris donato Guest

    Default Re: h2o venting

    draft hood is in place, also blocked the combustion air vent, pilot still went out?


  5. #5
    Lee Nettnin's Avatar
    Lee Nettnin Guest

    Default Re: h2o venting

    Had this problem once and the manufacturer told me, that there is insulation just above the access burner door that was supposed to be pulled down over the inner panel and then install the outer panel. I thought he was nuts, but I did what he said and the pilot never blew out again. Good luck!


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