yes, like mentioned make sure whatever you buy is an actual regulator, not just an orifice. An orifice functions ok when you are using water in the trailer by restricting the flow, but when you shut off the tap the pressure will equalize on both sides of the orifice. an actual regulator will maintain the set pressure regardless of flow on the outlet side. Generally water pressure isnt a huge concern in most places, but the odd place will be pretty high.
Only issue ive ever seen arise from "excessive city water pressure" is that its possible for the water pressure to jam the check valve shut in the water pump (or possible that it would leak back and fill the fresh water tank)
'14 XLR 395AMP
'16 Ram 3500 DRW, 6.7 cummins w/aisin trans and 4.10 gears