Called out for low water pressure on the house when multiple fixtures are turned on tested pressure was getting around 50 to 55 psi tested expansion tank found that it was ruptured gave estimate to replace expansion tank and PRV. Customer agreed replaced expansion tank and PRV was getting the same pressure installed a hose bibvalve before the PRV as a courtesyin order to check street pressure because outside hose bibs were on house pressure was still getting 50 psi on newly installed hose bib went around to five different neighbors check their city pressure and they were getting around the same. informed home owner that it is now on the city side. tested everything we installed no leaking at this time.