On Thu, 03 Nov 2011 22:26:45 +0000, Tim Watts
wrote:

This is true. One set of boiler installation instructions I read said to
take the last bit (1m, IIRC) in metal pipework and not plastic.

I had to rectify a cowboy's work on a new boiler. The tosser had
connected the Qualpex right onto the boiler. It had lasted three
months or so, which surprised me.