a month ago i asked about running a vent line with a low point before it ran up to the siphon break. someone posted that it might be a point for ice and i thought that idea had merit. then someone posted about the vent lines in some wings that have one or several loops to prevent leaking fuel and what about ice in those loops. the question about the loops was never answered and i brought it up in another recent thread without any response. so the question still remains to me.........are low spots a danger for icing and what do the builders think of this that have loops in their vent lines. any takes on this would be appreciated.