2 questions,, routes and water

I also can't answer #1 but I will echo what was said about your second question. Your fresh tanks should be sanitized once each year and that is best done at the start of the season. Water tanks will grow mold, etc. and you don't want to get you and your family sick. Bleach is easiest to use and fast. There are commercially sold tank sanitizer chemicals but why spend money when a half cup of bleach added to water does the same job. Flush with fresh water first, add water and the correct amount of bleach, let sit for four hours (or more) and drain. Flush again with fresh water and you are good to go.