I used to co-ordinate water refills with taking the car to the mechanic. I got water from a local mom and pop water filtering business. But the last time I took the car to the mechanic I realized that I needed a plan B in case the mechanic took longer (eg, waiting for some hard to find part). So I decided to use home filtering as a backup plan. But it turned out to be a lot more convenient than a weekly water refill revisit, so I am, for now, continuing with home filtering.