Assuming you are talking about filler and not the tank itself, mine looked like this (see link). A food grade hose connects filler to tank and the vent line is another small tube. Both tubes are held in place by what looks like nothing more than radiator clamps. You might just a loose clamp. I wouldn't rip stuff out unless you absolutely have to.
http://www.campingworld.com/shopping/item/gravity-water-fill-polar-white/60332And when I bought a little longer hose, RV place said there was 2 or 3 sizes. So don't trash any hoses until you match up the diameter in size.
I just put putty tape behind plastic filler and outside siding to keep water tight.
First couple times filling, I watched for leaks.
(Thanks for bring that up I need to add to my spring time check list, to make sure clamps are tight).
Hope this helps