No bypass but then no bypass is needed
Somewhere on the driver's side is a CITY WATER connection (NOTE: There may be a valve nearby you need to set properly, often called "Quick Fill" but any valve with FILL in it's label applies)
Water is supplied to the motor home via a "T" fitting aft of the water pump. So if you have city water there is no need to fill the tank UNLESS. as is my case, the "City" (Park) water is subject to power fail, IF that happens my on-board pump supplies water as needed.. if not, then I get it from the parks' well direct.