Unbelievable. I bought this bus to use, and use it we do. All of it.Including the fresh water supply. One of the first things I did was to throw away the water filter. Better pressure without it. I rinsed and sanitized the fresh water tank and will probably never do it again. We taste the water taps we use to fill the fresh water tank and if the taste is OK we fill up and use it. If I have the rig sitting for a month or more, I might drain and refill the fresh water tank if I think about it. We will fill a half dozen water bottles at the tap and put them in the refrig to have cold water handy if we need it, but we reuse those bottles until they spring a leak.
Over 200,000 RVing miles and still going strong, using on board water systems so I don't intend to change now.