Using a water regulator, whether an adjustable one like this one I use or a preset version can save your RV’s plumbing system. Many campgrounds don’t regulate their water pressure and it’s up to the user to protect their investment. I decided to go with an adjustable regulator where I can make adjustments as needed. I typically run around 45 PSI.
Adjustable Pressure Regulator
Non-Adjustable Pressure Regulator