the copper tube on top of my gas tank (vent) , the rubber hose connected to it is bigger then the copper tube.( is it supossed to be?) and should it be air tight? i know its a vent but not sure where the rubber hose goes from there its inside the hull, and also not sure if it matters if the connection is air tight since its a vent .........basicly i had a hole in my gas tank i repaired put the tank back in and when i went to connect the hose to the copper tube i twisted it a little and now it swivels, the thing is just welded in there so/? anyway im just tring to give as much info so this can be a one answer thread, thank you in advanced!