I had 90psi coming into the house at the main water valve. The bathroom sinks had very low flow and the tub had such low flow that when you tried the shower, water just dribbled out of the shower head. The valves to the sinks were open all the way.
My question is what types of things can I tell my clients when they ask me “what causes this”? (very high pressure- tons of volume - outside, but hardly any water inside)