Many  have BRINE  tanks on Brandy Lake for water purification or softener systems.    I clean mine once a year.

What happens  ..dirt accumulates at the bottom and prevents the brine from being sucked up the tiny hole….   The principle was invented by  Giovanni Battista Venturi.  Hence Venturi.  Basically two converging cones…big to small..small to big.  This increases the speed of the fluid between them.  This speed creates a vacuum thus sucking brine from the tank through a pipe connect to the high flow speed area.   This same pipe is used for fill

My tank has a raised bottom maybe 60 mm preventing salt particles from clogging the pipe.    A high level float level switch prevents tank  overflow on fill…

The only trick part is removing  pipe from the tank.   Do not overtighten….just snug when installing

Note..the white flange/pipe , in the end of the long pipe… that needs to be pulled out before nut will come off.  It is maybe 15 mm long.  Inside the nut is another grommet that prevents leaking.    See picture

Usually let the salt run low….then scoop it out and save it for winter ice.    The residue  water would have high salt concentration so make sure it goes over ground before hitting the lake…if at all.

Thoroughly wipe the tank with a safe solvent…that’s it.    To fill the tank..fast forward through the settings  until you reach ..:”REFILL” and let that go.  I measure my level with one bag of salt…..so I have a mark inside tank