Bay Hill was manufactured by Evergreen who closed operations in June of 2016. Dutchmen purchased one of the Evergreen plants, however it is not known if brand names and/or information was purchased.
You can try contacting Dutchmen directly to inquire:
Dutchmen RV Contact Us
If you can get access, trace the water line back to its source. The water must be coming from somewhere. With water running, listen for the sound of the pump operating.
You may get the info from the following: