Answer:
I just had a home inspected, and the inspector measured the static water pressure at 115 psi. He noted that this pressure shouldn't be above 80 psi and recommended installing a pressure reducing or regulating valve to get the pressure down to 80 psi. He warned that too much pressure stresses pipes, fittings, and valves and can cause any of these to fail.
Most solenoid valves on a washing machine or dish washer would not like to see over 80 psi Gage. other valves like faucets and boiler drains my leek sooner but will not be effected as much. The pressure relief valve on your water heater may exceed its 150 psi if heating from a cold take with out a domestic expansion tank, especially with existence of a check valve at the water meter.