If you're only a part-time RV traveler, you're probably concerned about what might happen to your water softener when it's not in use. Luckily, you don't have to worry too much about storage. Most RV owners store their water softeners in dark, clean places that won't get too hot or too cold. Most water softeners can be stored as they are and don't require draining, but be sure to check this with your manufacturer if you're unsure.