How do i fix this please

[lynniethom]

Help.
So I’m trying to fit a shower in a bathroom in an old tenement flat in Edinburgh.
Unfortunately the thread on the air off valve has broken (thankfully in the off position) and so will need replaced but I can’t switch the water off from the tank.
I don’t want to flood downstairs obviously.

It’s the copper pipe on the left that’s the issue.
Thanks
Lynn

 

[ShaunCorbs]

You will have to get access to the tank and either turn the valve off to your supply or drain the whole tank and replace the valve once drained

 

[lynniethom]

Ironically after much huffing and puffing that’s exactly what I have done. Thank you for responding to me. Cheers