On Sat, 05 Sep 2009 15:35:15 +0100, John Rumm
wrote:

So if the hole is straight, a pipe would also go through it... The only
problem you then have is if you want to have a pipe lead straight up or
down to it, and you would hence need a 87 degree elbow or similar.

Yes, I was able to pass the pipe through but the fitting was not flush
with the wall; it was at an angle.