B and C said:Yes it does and a sanitizing would take care of any leftover "stuff" in the tanks.
Do you know how involved a complete, and proper, RV sanitizing procedure is? How much water is used for this procedure? (possibly 100-200 gallons or more)
Be sure to have a gallon or two of chlorine handy....and you need to park the RV where you can drain dozens of gallons of heavily chlorinated water...there are threads on this forum where a bowlful of soapy water is frowned upon when dumped in the forest or the desert.
Time.....maybe a day or two parked in that location where you can drain. Several fills, drains, and refills. Several applications of strong chemicals. Possibly driving around to stir up the water in the tank. Then return, drain, rinse, and repeat. Then drain again, then refill.
Inspect....possibly testing. Change all the filters.
It's just not a simple 5 minute procedure and its not likely to happen at a campground or when boondocking where that water is already in short supply.
It's a trade-off, no doubt. For me, the answer is keep it simple and carry bottled water for drinking and cooking, in nice clean bottles and food-grade containers.
Or you can just take yer chances....and not worry about it.
At any rate, the OP certainly got more than they bargained for with this thread. Have fun with the new-to-you RV.