Without knowing what you might have, why not try a test as home with a measured container. Run the pump and fill the container, then connect to city water with a pressure regulator and see how much faster you fill the container.
You could also fill the container as a house tap with city water, and then through a regulator to see how much slower it might be.
I just wonder whether the tiny lines in most RV's might be restrictive as well.
Mike
2012 Winnebago Impulse Silver 26QP
2005 16.6 Double Eagle
2018 Jeep Wrangler JK
previously Snowbird Campers,
Triple E Motorhome and Fifth Wheel