Fresh water tank taking too long to fill...any suggestions?

joebedford wrote:
Screw in connection is usually the black tank rinse.

Never heard of a City Water connection did you.... Many RV's both motor homes and trailers have a city water connection for fresh potable water AND a connection to rinse the black tank

And some have a valve that allows you to fill the fresh Tank from the city water connection. More common on motor homes it's found on some trailers.

But if the inlet is also a pressure regulator. or if you use one in line. Read my prior reply.