Vent / overflow on front sac

[moombadaze]

I think I need to do this too. My front bag fills up with air. Can you use the existing thru-hull and a Y connector? If you add a check valve in the vent line, will air push right through it and get out?

Grab one of the wifes wine bottle corks for the exit thru hull for when your towing, when ya get to the flint pull it out. Simple/cheap