We have an old Mira Sport shower in a downstairs bathroom which we no longer use. However I've noticed there is water leaking from the bottom of the unit. We had this same problem some years ago and had a new unit fitted. I have turned the electrics off at the fuse box which supply the shower, for now I would just like to prevent any nasty water surprises by disconnecting the unit and either capping the pipe or fitting an isolating valve. I am very much a DIY novice though, so wonder if I ought to call a plumber or whether this is relatively simple task, even to a novice. Picture attached. I'm assuming the brass fitting which has "15" on it, plus the nut on top are part of the shower unit, so I would be looking to cap off the copper pipe that comes down into it. I previously attempted to cap an unused pipe with no luck as water came p***ing out of it afterwards so I'm a bit reluctant to attempt this unless it is dead easy and someone can advise of the correct cap fitting to use, a quick google talks about compression end caps?
Thanks in advance.
Thanks in advance.