Removing sink and leaving pipes

[BlessedHome19]

Hi, I’d like to remove a sink from a spare bedroom. It’s a pedestal sink.

If I turn the isolation valves to off, remove the sink and leave the valves switched to off if this be okay for when I switch the main water supply back on?

Or will I need to use a compression stop end on the ends of the pipes? Do I need to use an olive too?

 

[terrymac]

Fit blanking cap nuts to the isolation valves.

 

[Schooldays]

If you’re permanently removing it then you should cut out any dead legs.

 

[DBCDIY]

As per Schooldays advice.
Leaving 'dead legs' means the stagnant water in the pipes could become a breeding ground for bacteria - including the infamous Legionella.
So cut back to just short of junction with main pipes and then cap off IF it's a permanent job.

 

[terrymac]

If you don't intend to replace / fit a new sink ,you would also need to cap off the waste pipework.