On Fri, 04 Sep 2009 09:42:14 +0100
"Dave Plowman (News)" wrote:

In article ,
Stephen wrote:
I tried to drill a hole through a 500mm concrete wall yesterday. I was
snip

I'd tend to use a drill quite a bit larger than the pipe and sleeve it
with PVC where it passes through the wall - you can get clip on sleeves
designed to pretty up radiator tails which work fine.



Me too. I use WC solvent-weld overflow pipe (22mm OD/19mm ID).
I've also used it to put radiator tails in a stud wall - as a conduit.
Useful stuff, and dead cheap.

R.