Best way to sanitize all the plumbing in a new rv?

I used to do all that. Then I found distilled water in gallon jugs in grocery stores everywhere. Usually, about $.50 to $1.00 per jug and no funny taste. I use it for coffee, cooking and teeth cleaning. Of course, my teeth clean themselves in a little plastic container of water with an Efferdent tablet in it every night. I just use the CG water for showers. I'm waterproof. :)