On Wed, 18 May 2011 16:43:14 +0100, Ron Lowe wrote:

Use blue MDPE water pipe as a conduit.

Please no. Get a bit of black if you must but not blue.

Otherwise some one will find it and be miffed when it isn't water.

Or like here find a bit of "waste pipe" beneath a sink heading into
the floor heading in the direction of drain that is in the way. Cut
through it only to find that some bozzo had used it to sleeve the
rising main...

Fortunately I knew where in the bank 20 yards down the road the
external stop cock is and I had a key to reach it...

--
Cheers
Dave.