We drink, cook, wash, coffee, cat water from the TC's fresh water tank all the time. I sanitize the fresh tank 1 or 2 times a year. Our city water is already chlorinated. I flush out the white hose before connecting to the TC and filling the tank to get rid of the disgusting white hose smell and taste. If we have full hook ups, I have to run the cold water about 30 seconds to get rid of the white hose smell and taste every time I use the water. I've had the TC sit with a half tank for up to 2 months before with no perceptible smell in the water. Have not tasted 2 month water. After these longer periods of sitting, I will sanitize. If the TC is just sitting for more than a couple weeks, I'll usually run about 15 gallons or about 5 minutes of water into the tank with the drain valve open and also water squirting out the over fill vent line. I also run 2 pitchers water through the cold line all faucets and same thing for the hot but 4 pitchers due to the water heater tank.
