Join Date: Sep 2013
Location: South Devon
My Motorhome: Bessacarr E725
Thanked 162 Times in 141 Posts
Your question lacks a bit of detail. Looking at Google Images, it appears that the sink tap is also the shower head.
Where exactly is the water appearing? If not from the tap itself presumably the leak is under the sink where the hose connectors and shower are connected to the tap assembly. You need to stick your head under there while it is leaking. I assume there is a cupboard door or removable panel for access to the underside of the taps.
Try and give us as much detail as you can. You only get 5 free posts on this forum and then you will need to subscribe. If you are new to MHing, it's a very worthwhile investment.
I'm daft and proud of it.