03 660 Grizzly Vent Lines

So i started my Homemade 4 stack 1.5" ID Flex PVC hose snorkel. My question is… or concern is all of the vent lines,
I was going to make a 5th Stack for all of the vent lines, But i dont know how i feel about running the overflow for the gas and coolant into a stack with the lines for Fan, Carb and Diffs air lines.. any suggestions? I was going to cap the bottom of this stack with some sorta drain plug. But in general, You would never want any sorta liquid near those "breather" lines. What has everyone else done?