Homeowner has a 50 gallon electric water heater that is leaking from the cold inlet. The water heater is piped in with flexible stainless steel piping, with a failed expansion tank that is not supported and is leaning against the wall. The heater is piped in with push-to-connect fittings. Tested water pressure and found water pressure to be approximately 100 PSI. Removed flexible stainless steel piping from both the hot and cold side. Removed cold inlet nipple and replaced with a new nipple. Installed 2 3/4” brass female adapters to heater. Installed approximately 3 feet of new 3/4” type M copper and connected to existing copper. Mounted expansion tank bracket to stud on wall behind water heater. Mounted expansion tank to bracket and installed approximately 12” of new 3/4” type M copper and connected to a tee on newly installed copper. Installed 3/4” brass quarter turn ball valve before expansion tank tee on cold side of water heater. Removed old pressure regulator and old gate valve