Probay not, but it depends on what options you ordered. On my basic 2008 13’
Scamp, the (optional) city water connection goes directly to a single cold water faucet at the sink, nowhere else. The standard gravity-fill tank feeds a separate hand pump faucet. The two are not interconnected. Both drain via the sink to an outside fitting as shown in an earlier post.
Most 13’ Bolers came from the factory with a simple system like my Scamp, but after 40-50 years, no telling what changes may have been made. A big clue that you may have a fancier system is a 12V water pump. You should be able to see any branch lines from the inside of the cabinet where the city water line comes into the trailer. Mine has none.