How to isolate water to Mira 7.5kw electric shower help please?

[nursek]

Hi we have a very old seldom used Mira 7.5kw electric shower, (we use our other mains shower instead) this morning the shower started leaking out the box, turned the water and electric supply off and took cover off (see pictures) the bracket has cracked and water leaking from the pipe joint (arrowed) with the shower being over 25yrs old we have arranged to get it replaced but with the bank hols etc can't get done until Tuesday. We tried turning water back on briefly (to flush toilet, run washing up etc) the shower then started leaking heavily. We can't place the isolator valve, the shower seems to be fed by a pipe in the airing cupboard but there doesn't seem to be a valve on it. So we have had to keep our water off completely- has anyone any ideas about a temporary solution so we can turn the water back on please?
Is the isolator valve accessible if we remove the shower behind it?
Thanks

 

[terryplumb]

You would need to remove the shower from the wall and cap the supply pipe if there is no isolation valve on the supply to it. I think it's unlikely that there is an isolation valve directly behind the shower.

 

[dilalio]

Yep. Either emergency plumber time or remove it. Make power safe and cap the cold feed.