OK, time to really embarrass myself!
Yes it does get very wet, yes it does have a bit of tube with a plumbing fitting. But it is not connected to anything and until now I had no idea what it was for or at least thought it was for something else.
When I got the car it was sitting in the boot and I thought it was a home made gadget for filling cooling system.
If that is not bad enough I took it out at the end of last summer on one of the many occasions on which I was drying out the boot liner and sat it on top of the engine. Fair- enough if you remember to take it off the top of the engine when you put the carpet etc back in or at least before you drive off.
Inevitably I didn’t.
I got about 5 miles before I started to choke and noticed black smoke belching out the back. Inevitably the tube had fallen onto the exhaust manifold and started a minor fire. Lots of nice toxic burning plastic type smoke.
Still only damage was to the tube and to my fingers when I reached in to pull it out and throw it into a conveniently close river. Could have been so much worse!!
I do still have it although it is a wee bit worse for the fire so I think it is off to Sanjoy’s ropes and chains section to replace the melted / incinerated section of tube.
Its going to make a difference having a semi dry boot!!
Amazing what you can learn on SE.