Put very simply, a water
softener works by passing hard water through a cylinder
containing ion exchange resin.
The resin consists of tiny beads that
attract and retain the hardness minerals, letting the
now softened water flow on.
Periodically, these resin beads are
automatically cleaned and regenerated by rinsing with
a small amount of brine - a salt solution.
The brine, with the accumulated hardness,
is then flushed away to drain.
All this takes place automatically within
the water softening appliance, there is little else
to do other than the occasional top-up with granular