Not too long ago, RV water pumps could be damaged if they ran for very long without water being pumped through them. They would heat up and damage the diagram. Todays pumps have been redesigned so this does not happen, they can be run without water passing through them. Since you have a 2013 RV, I would think you have the "new" design pump, however, that may be about the time the"old" design was still being installed at the factory.
Typically, if the pump is damaged, it doesn't pump water or the water stream is reduced.
Check the pump mounting screws to be sure it's still mounted correctly and not loose. Most pump noise comes from the vibration that happens between the pump and the surface it's mounted to. If it continues to work ok but make excessive noise, you will have a $100 decision to make--put up with it or replace!
Days camping (2015)----88 days
Days camping (2016) ---110 days
2016 Wildcat MAXX 28RKX (33' TT), 2007 13' Scamp
2015 Ram Laramie Hemi
30 years RV'ing
12 different RV's