Reply To: Roof vent vis-a-vis window

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    Originally posted by Wallingford Plm +Htg:
    The minimum size of the roof terminal according to good plumbing practices is not 4″ diameter.The size will vary from state to state.Even in cold states 4″ is not alway’s required.I would ask a local plumber who doesn’t have narrow minded views.

    The code sets minimum guide lines.

    By the way Sylvan, I also use a 4″ VTR as it is just good plumbing.

    [Edited by John Aldrich on 02 May 2001]

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