by plumbbob »
Sat Nov 22, 2008 4:55 pm
This is a tricky one to answer. In the past, I have had to use an angle grinder to remove old wastes yet on some they can be undone with almost no force at all.
Part of the problem is gaining access to the large nut and finding a way of stopping the plughole from turning whilst you remove it.
If the basin sits on a pedestal, it may not be possible to change the waste without removing the basin from the wall.