(57) A water softening system in a dishwashing machine of the type comprising a decalcifier
device of water from the mains, containing decalcifying resins, a salt container to
produce a saline solution for regenerating the resins contained in the decalcifier
device, a container for the metering of regeneration water having a plurality of tanks
to supply volumetrically defined amounts of water to the salt container, for producing
the regenerating saline solution, said tanks, which are so arranged to be filled up
in parallel, being of the air trap type and having upper vents, whose opening determines
the filling of said tanks. According to the invention, a selector (8) is provided,
being integral with the container (1), which can take a plurality of working positions
(V1,V2,V3,V4,V5), each one of said working positions (V1,V2,V3,V4,V5) corresponding
to the opening of a different combination of vents (S1,S2,S3,S4) of the tanks (R1,R2,R3,R4).
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