Okay, you were not there so this is hard to figure out. But some of the home inspector types like Charlie Buell will probably come pretty close or nail this one. And, since it is my puzzle, I get to give you the clues as I see fit.
This was a home I was inspecting a couple weeks back. I had met with the seller, who was there that day and was walking around with me part of the time. I had begun working and one of the things I do, first off, is check the water pressure. A normal water pressure reading is between 40 and 80 PSI. Too low and it is like a trickle, too high and it can damage the dishwasher, washing machine, hot water heater.
I took the water pressure reading at the back hose bibb at 10:15AM. It was really high, over 100 PSI. I took the reading again, at the same hose bibb, five minutes later and it was fine, down to 55 PSI, and it remained that way. Anyone care to guess what kind of event occurred that "repaired" this problem? Even if you do not care to guess, at least you learned how an inspector reads the water pressure and what the reading should be.
Thanks for guessing.
Steven L. Smith
Bellingham Home inspector