Fresh water tank fill issue

UPDATE PART TWO: mobeewan, yes I did sanitize the connection before I made the swap. But I also discovered that there should NOT be a check valve in the connection to the black tank flush. My black tank flush does not work, and while trying to troubleshoot this issue, I found a check valve beneath the bathroom sink. This valve prevents black water from running back through line to the connection. And having a check valve at the connection would keep water in the line, which could freeze in winter, so I'll have to remove this check valve at the connection. I've discovered that my problem is either a clog in the sprayhead or a kink in the line going to the sprayhead. Wayneat63044: Thanks for your info about the fresh water overflow. Sounds like I now have another issue to address. We had a storm come through here Thursday night, and when I went out to the camper last night, I discovered that the bed was completely soaked. Apparently the streetside window next to the bed is not sealed, and water came through the window and soaked everything. Needless to say, I'll be taking the camper back to the dealer to have some issues fixed.