Hugo Nebula wrote:

On Sun, 18 Sep 2005 12:04:59 +0100, a particular chimpanzee named "Set
Square" randomly hit the keyboard and produced:

It seems the first and third are definitely there. Crawling round the
loft space yesterday, I found an empty 1 litre bottle of Sentinel (?)
inhibitor. Assuming they put the full bottle in and no more, is this
enough for a seven radiator system?

Yes.

I'm not hopeful of getting a response from the installer. He's got
his money, and wouldn't respond to my concerns about the system last
year. Short of throwing good money after bad to hire solicitors, etc
to get him to put things right, what options do I have?

Take it up woth the manufacturers. For this you'll need the benchmark
certificate (A4 white card with light blue print & logos etc on it) which
the installer completed and left with the customer when he completed the
job.

Didn't he!??

If he didn't then the manufacturers may wash their hands of it since the
benchmark is the evidence that the boiler has been installed correctly, and
you'll have to get heavy with the installer to sort it out.