What does water softener mean in practice?
It lowers hardness during service and regenerates exhausted resin with brine, sending calcium and magnesium to drain.
When does it matter?
It is not a filter for every contaminant and does not remove TDS, microorganisms or most organic compounds.
Which solutions are related to it?
Size it from hardness, consumption and peak flow and provide drainage, salt, bypass and post-start hardness checks.