We've been RVing for more than 20 years and the only time I have sanitized the fresh water system was because I left well water (not treated) in the fresh water tank and it smelled terrible.
We used the on board water for everything except drinking. We carry a couple one gallon plastic jugs for drinking water. One jug at a time will fit nicely on the right side of the top shelf in the refrigerator. I keep the other in an outside storage compartment.
We have never had a smell problem with treated city or county water. And we've never gotten the hebie-jeebies.
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