Depends on how the 1/2 valve was put in.
There are ones with a nut at each end and then there is the type the is soldered on to the copper pipe.
With the soldered you might have to cut or you might be able to undo the solder.
There are ones with a nut at each end and then there is the type the is soldered on to the copper pipe.
With the soldered you might have to cut or you might be able to undo the solder.