I noticed that something fell off mine last night when I closed boot, did some looking and indeed the rubber grommet from the drain pipe has perished, this morning I have been in the cupboard looking for an old curly straw the hard plastic type which the drink goes round and round before entering the mouth,you know what I mean probably, anyway I’ve cut a small straight piece of the straw abour 3/4 inch and pushed it up the pipe, very good fit , then put the old grommet where my new pipe slightly sticks out with a bit of sealant around the edges job done