On 08/05/2015 20:00, gareth wrote:
The plumber suggests that one should not drink water from an
installed water softener, but that a direct-from-the-mains tap must
be installed to suit the water by-laws.

What's the danger here, when tap water from a soft water area
is so much more potable?



There is more sodium in the water, too much sodium is bad for you.


Also, can softened water be used on the garden and

Yes, but it costs more.

to fill the fish pond?

Too much sodium is bad for fish, but it would take a lot of evaporation
and refilling to build up to dangerous levels.