Methinks 78 lbs is not normal.
:) No, apparently the pressure should be about 50 psi inside the house. If the pressure if too high it will damage certain appliances and the screw up whe toilets. One of my toilets developed a leak inside the tank... so I had to adjust the screw pushing on the valve stopper, so that it would overcome the extra pressure and shut the water off ... it works, but I can see, that eventually, it might cause damage and then I will have to replace all those little parts, etc etc, worse, my toilets are not exactly the ones you find parts for everywhere... a drag Yes I googled...but I get a lot of nothing really... I remember the days of the USENET, with tons of people to talk and "be insulted" as well... good ol' days LOL.
"Methinks 78 lbs is not normal."
I think sixty is about normal but it can go higher at night when demand is down..