Just kind of surprised by this one. Had 2 a.s.v. blow on the pressure side where male adapter screws in to valves within couple months of each other. The main reason i'm surprised was the reading i got. I had my client call the water purveyor and got a confirmation about my readings of 90 psi with a 13 plus gpm off of a 3/4 main line from the street water meter. What could the city have done that could of increased the volume and psi available? I would think that with those kind of readings when the house was built 40 years ago, they would of installed a water regulator after the main house shut off. None of the houses on that block and around the area can you see an obvious water regulator I know recently recently because most of the municipal water pipes are being replced( some are over 80 years old) with new pipes. Could pressure and volume increase that much. This city uses part of the Hetch Hetchy(san francisco water dept) water and some city wells. Im just wondering because i'm sure my client isn't the only one having overpressure problems. I know just the other day the neighbor had a joint come apart under her driveway(copper water line) Any thoughts?