Before you race out the door, run a manual regeneration cycle. This will use up the remaining salt brine and flush it out. Do this when you’re ready to leave, not the night before.
Should You Turn off Your Water Softener When on Vacation? | Angi
Once the regeneration finishes (takes about 90 minutes), switch to bypass mode. Then run a cold tap for five minutes. That clears any salty water from your pipes. You don’t want your plants to get saline shock while you’re gone.
Your house will now have hard water for a week. Big deal. It’s like going back to nature. Your hair will feel different. Your dishes might spot. You’ll survive.