vent pipe freezes solid

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by becker, Feb 8, 2007.

  1. becker

    becker New Member

    Feb 8, 2007
    semi retired, parts manager
    northwest indiana
    My vent pipes freeze solid ice in real cold weather. I am on a septic system. I have to go on the roof and thaw them out with a torch to keep the smell out of the house.
    What can I do to prevent this from happening? They are both 4 inch plastic pipes. Only the part above the roof freezes.
  2. student1

    student1 New Member

    Dec 7, 2006
    Ontario, Canada
    Had same problem some years back. With only two people, the septic system didn't generate much heat. Resolved by insulataing the vent pipe in the attic with 4" fibreglass. Good luck.

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  4. kordts

    kordts In the Trades

    Oct 15, 2005
    industrial service plumbing foreman
    exurban Chicago
    Wrap the the vent in heat tape, if it's metal.
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