Broken fuel filter lid

[Iaitoo]

I noticed that the hose connected on the top of the fuel filter lid had a little crack in it.  Well, not the hose, but the plastic nipple it sits on.
Tried to take the hose off to get a better look, and the hole thing just came off. The plastic there is rotten!
Is this a fuel line or a breather pipe? If I buy something like in the picture below, would it be enough? Or will it be pushed out?

[welshpug]

just get a replacement from a breaker, its a fuel feed pipe.