On Sun, 07 Jul 2019 14:07:12 +0100, Peter Parry
wrote:

On Sun, 7 Jul 2019 12:19:01 +0100, Gareth's was W7 now W10 Downstairs
Computer wrote:

Clearly, the nuts on the fittings need to be nipped up
again, but is the greenness indicative of a high rate of
corrosion in the system due to the salt, or is it just
a reaction to the air once it had seeped?

Water softeners do not introduce salt (NaCl) into the water pipework.

Oh yes they do!!

Or at least my last one did. They should rinse out any free salt, but
if the timing is out or the device isn't plumbed in correctly salt can
enter the users system.

I seem to recollect that there are variations of the reagant available
if dialasys patients or people on low salt diets are end users of the
water.

I like the term "crumpable olive" incidentally. One of those little
gems that does sound so much more adequate than a mere "compressable"
conveys.

AB