Depends on elevation change between the water source and the house location... I believe the formula is every 10 ft rise is about 2.1 PSI. So assuming a base pressure of 50 PSI at the water pumps, its seems to be a drop of elevation of about 100 ft.We really have been shocked that this high of a pressure was even a possibility given the street location etc. How common is 155psi at the meter?
On the flip side, the pumps might be at your same elevation and they have the pressure kicked up to 155 PSI to have it reach houses with 100 ft elevation change above the pumps... lol
In most locations (the flatness of Florida and most of the south excluded) a PRV seems to be a standard need.