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tool if needed

  1. Plumbing Code
    ok guys well im at a standstill on this.. the shower in the upstairs that was just added has no room in the attic to cut a vent and put in a 2x3 so with that being said .. in cook county is it code if no way to put a vent in to do a loop vent in the wall? kind of like a island vent? or am i...