"IMM" wrote in :


You say when they are not drawing water?

No - I wrote this:
"It does not seem to occur every time that they draw any water - but only
from time to time."

I do not follow their habits sufficiently intently to know precisely what
they are doing when it shrieks - but on the basis that many hours go by
without it occurring, it seems safe to assume that they can draw some
water, sometimes, without causing the problem.

--
Rod

www.annalaurie.co.uk