Actually i think i just sussed it out 5 minutes after i posted - the pipe has yo come out first which needs a bigger allen key than I have  hopefully ...

Thank you EricL thats a great idea - is this something someone who’s never done anything like this before manage? I have a masonry drill and a jigsaw ...

I bought a little rubber seal from bunnings for this when i moved out if my rental because i didnt want the cleaners to flood the cupboard. - think i ...