Most if not all water softeners have a bypass valve built in to the unit to allow service. You just switch the valve on the unit, run enough water through the tap to flush the line, now you have untreated water available to brew with. Just don't forget to switch it back when you're done brewing.
First of all, I tried a search but I got 12 pages of items with the word Water or the word Software so I'm asking.
The house we are moving to has a water softener because the water is fairly hard. I'm going to have water put into the garage for brewing and it will by-pass the softener but that may not be until next year so I'm wondering what I can expect if I use softened water to brew with?