On Mon, 24 Aug 2009 15:09:29 +0100, wrote:

On Mon, 24 Aug 2009 11:11:34 +0000 (UTC), Gordon Henderson
wrote:

Is this a technique of olden times as I'm not sure I've seen it before.

A lot of old plumbers did it. I made the tool for 15mm pipe in an
electric drill years ago for curiosity.

It was simply to save on the cost of fittings and took only a few
seconds to do.

It did make really nice elegent joints as well.

and 1 fewer joint per, er, join.
--
Peter.
The head of a pin will hold more angels if
it's been flattened with an angel-grinder.