"Christian McArdle" wrote in message .net...
unfortunately it seems like most of the standard stuff seems only to
be made in dual-flow...

That is for 2 reasons.

Firstly, it allows mixed pressure supplies, which are very common in the UK
with cold mains water and gravity fed hot water.

Secondly, as the main drinking water tap, it prevents contamination from the
hot water (which may have been sitting around in a tank filled with dead
rats and sparrows).

Christian.

yes, but i thought that these concerns could be dealt with by suitable
modifications under the sink, so allowing a single-flow to be
fitted...?

james