Sanitize the Water System

Update: This post was written before I started living in our RV. I now sanitize the fresh water tank about every 3 months. I’ll update the process soon.

There are a lot of great tips to be found on the web. I was reading the top 10 RV tips.  I’m one of those RVer’s who doesn’t use the fresh water tank for drinking water, in fact the majority of the time that tank is empty. So I never gave much thought to sanitizing the fresh water system. I know..Gross…Don’t tell my wife. The site recommends every 6 months sanitizing the entire system. Is this a good rule of thumb for an RV that sits over the winter with the drain valves open. Is an annual cleaning good enough or should it be more often. What do you do?