[Land-speed] Vent Tube Routing

[bobbyhotrods at comcast.net]

Hello list. After looking around for a compact Moontank check valve, I found one at Coleman Racing. I know the preferred routing for the subsequent vent tube is a nearly 360* loop around the tank, but I'll confess I don't fully understand the concept. If any fluid got in the tube wouldn't it interfere with breathing, or is that the idea, such that any gas that gets into the tube will get sucked back into the tank? Also, for the sake of a neat appearance couldn't I just route the tube down the back side of the tank, across, then up to approximately the same level? Thanks, BJ