You will have to shorten the drain pipe until it is just about even with the wall surface. It is difficult to tell you how that can be done without seeing the installation, since there are many ways of doing it but the best way depends on the details of yourpiping . : I am trying to install a Pedestal Sink where I used to : one mount to the wall in my bathroom. The problem : is that with the drain pipe sticking out so far I wont : be able to bolt the sink to the wall. Any advice would be : greatly appreciated since the working sink is gone.