s--p--o--n--i--x wrote:

On Wed, 15 Jun 2005 10:04:37 +0100, "Christian McArdle"
wrote:


1. You must be competent. This means that things like jointing pipe, leak
detection,


Squirt copiuos amounts of fairly liquid around the joints and wait for
the bubbles

The problem with doing this is that the leak may be greater that the
liquid's ability to create a bubble. I suffered this problem looking for
oxygen leaks in the cockpit of aircraft.

A better way to check for leaks is to use a brush and make a collar of
small bubbles around the whole length of the joint. If you can make a
full 360 degree collar then you can see if any of the bubbles begin to
grow. The use of a mirror and lots of patience helps in proving that
there is no leak. If you fail to make a 360 degree collar, then you have
a big leak.

HTH

Dave